Cash waqf from the millennials ’ perspective: a case of Indonesia

Purpose – The purpose of this study is to explore the awareness and willingness level of millennials in Indonesia toward cash waqf (cash endowment). Cash waqf has gained huge attention in Indonesia because of itsflexibility,especiallyafterofficiallyannouncingthatcashwaqfpracticesaresharia-compliantin2002inthecountry.Millennialscomprise33.75%ofthetotalIndonesianpopulation.Therefore,itisvitaltoanalyzecashwaqffromanIndonesianperspective.ThisstudyprovidesvitalinformationforallinstitutionsthatareconcernedwiththeenhancementofthecashwaqfcontributionsinIndonesia. Design/methodology/approach – Self-structured questionnaires were distributed in Java Island to collect the data. The data were examined by employing suitable statistical tools. Besides, post-interview fact-finding was conductedwith cash waqfexperts from differentrelated institutionsin Indonesia toreach a more in-depth understanding about cash waqf issues. Findings – The results depict a high level of awareness about cash waqf among millennials in Indonesia. The resultsfurtherrevealalowerwillingnessleveltocontributetocashwaqfofthesamplepopulationascomparedtotheirlevelofawarenessaboutcashwaqf.Moreover,cashwaqfpromotionsmustfocusondeliveringadeeperunderstandingabouttheconceptandhowitdiffersfromothertypesofIslamicphilanthropy.Theresultssuggestthatwaqftrusteesinthecountrymustbemoretransparent.Moreover,theIndonesianWaqfBoardshouldimplementstricterrulestomonitorwaqftrustees. Research limitations/implications – This research concerns the willingness and awareness toward cash waqf among Indonesian Muslims who were born between 1980 and 2000. Practical implications – As a Muslim-majority country, one would expect Indonesia to make much progress in cash waqf. By providing an explanatory understanding of willingness and awareness of cash waqf among ’ s (waqf trustee) reputation, thereby boosting waqf ’ s national shares by ensuring a proper allocation of cash waqf. The regulator should be more strict in monitoring nazhir ’ s practices. For instance, it could include a periodic assessment of waqf entities. Originality/value – Thisstudyisoriginalinnature;thereisnopreviousstudythataddressesthemillennial ’ s perspective toward cash waqf in Indonesia. Hence, this study presents precious informationfor policy makers, practitioners and researchers. current


Introduction
There has been a significant growth of Islamic social finance in the contemporary world, particularly in the past few decades. In the Islamic context, waqf (Islamic endowment) is simply interpreted as holding an asset and limiting its consumption to frequently extract its usufruct for the benefit of beneficiaries (Zauro et al., 2020). Typically, waqf practices center on buildings and/or lands. However, many donors cannot afford to donate an asset in its entirety to participate in waqf activities. Hence, cash waqf (cash endowment) is an important option for donors who do not have a fixed asset but rather have movable assets, i.e. cash, for donating. All the strata of a society can perform sustainable charitable activities through cash waqfregardless of the amount of moneyas long as they are keen on doing it voluntarily for the sake of gaining Allah's (SWT) pleasure (Aldeen et al., 2020).
Cash waqf is a powerful, permanent and pervasive instrument since it is a voluntary activity characterized by perpetuity (Haryanto, 2013). Since cash waqf allows all Muslim segments to contribute to waqf practices, its potential is quite high if it is properly promoted and managed. Waqf has attracted the attention of contemporary researchers around the globe. It is perceived as an important socio-economic vehicle that adheres to Islamic principles. Moreover, it is recognized as one of the sustainable funding mechanisms to serve communities (Mustofa et al., 2020).
The term "millennials" refers to the generation that was born in the 1980s and 1990s (Jang et al., 2011). Millennials are great assets for nations; they are future leaders and can potentially advance economic development. It has been said that millennials are the most educated generation (Ogamba, 2019). Therefore, tremendous attention has been given to the millennial generation because of the impact they may have on the economy (Ogamba, 2019). Consequently, the millennials' economic empowerment has become an unavoidable integral part of the strategies of sustainable development (Ogamba, 2019). The millennial generation in Indonesia comprises a huge population of 88 million (Andika, 2020). Besides, Indonesia has been ranked as the most generous country in the world (CAF World Giving Index, 2021). Furthermore, as individuals, millennials are well known for their behavior of being lavish with money (Saeed and Azmi, 2019). Therefore, it is crucial to seek a deeper understanding of cash waqf from the millennials' perspective so that waqf institutions can put in place proper procedures to enhance the millennials' participation in waqf activities that promote economic development.
The earliest waqf experience in Indonesia started when Islam was introduced in the country back in the middle of the 13th century (Ihsan and Ibrahim, 2011). Indonesia has recognized the importance of waqf revival to uplift society's living standards. The Indonesian government has made major reforms for the revitalization of waqf institutions through the enactment of the Waqf Act No. 41/2004, which covers all forms of waqf (Prihatini et al., 2005). This act has given new hope for the improvement of Indonesian waqf management; it regulates several relevant essential matters such as the responsibilities of waqf trustees and types of waqf, and it has established the Indonesian Waqf Board (BWI) (Prihatini et al., 2005). However, this act has been criticized as not being comprehensive enough because there are many waqf mosques, lands and universities that are still not managed properly (Ihsan and Ibrahim, 2011).
On May 11, 2002, cash waqf was officially declared permissible by the Majlis Ulama Indonesia (MUI), who specified that the principal value of endowments must not be used up or reduced. The MUI also attributed the responsibility of maintaining the sustainability of waqf assets to waqf managers (Badan Waqf . Prior to the aforesaid announcement, waqf practices in Indonesia were mainly in the form of lands dedicated for religious purposes, e.g., Islamic boarding schools, mosques and graveyards. However, it is said that those properties were not used in the most favorable way (Ihsan and Ibrahim, 2011). For example, only 3% of the waqf lands in Yogyakarta were used to promote socio-economic development, while the rest were employed for the above-mentioned religious purposes. Indeed, the socioeconomic impact of waqf was neglected, while waqf assets could have been managed more efficiently to extend their benefits to the needy (Suhadi, 2002).
In terms of figures, a total of 190 n az _ ir (waqf manager) institutions have been established as at the end of 2018 (Badan Waqf Indonesia, 2020). In the same year, the total amount of cash waqf reached Rp255bn (US$17.5m), while the estimated value of waqf lands was Rp2,050tn (US$141.3bn) (Badan Waqf .
Given the potential of waqf development in Indonesia and the significant number of millennials in the country, the main objective of this research is to critically evaluate the awareness and willingness level among Indonesian millennials in relation to cash waqf. Moreover, this study aims to evaluate their perception of cash waqf promotions and their trust in n az _ ir institutions in the country. This research is important because it will shed light on the possibility of engaging the millennial generation in waqf activities to maximize cash waqf participation in the community. It will also benefit potential waqf trustees by providing insights into current practices and the current situation of cash waqf in Indonesia. Moreover, it seeks to contribute to the Islamic social finance literature on Indonesia, particularly from the millennials' perspective.
The sequence of this article is as follows: the brief introduction is followed by a literature review relating to cash waqf; the next section presents the methodology employed in this research, followed by the findings of this study; the final section concludes the study.

Literature review
The concept of waqf and cash waqf Waqf is an Arabic word that means "to contain, preserve, or stop." In the Islamic context, it means to hold an asset and prevent its consumption for continuous extraction of usufruct for particular beneficiaries (Zauro et al., 2020). There is no single verse in the Qurʾ an or h _ ad ıth (Prophet's saying) that directly specifies waqf. However, many scholars have associated waqf with many verses in the Qurʾ an, for instance: Never will you attain the good [reward] until you spend [in the way of Allah] from that which you love (Qurʾ an, 3:92).
The following h _ ad ıth also relates to the concept of waqf: When a man dies, his deeds come to an end except for three things: s _ adaqah j ariyah (ceaseless charity), knowledge which is beneficial, or a virtuous descendant who prays for (the deceased) (Muslim).
Waqf represents an endless form of charity that draws the donor closer to Almighty Allah. The reward of waqf benefits the donor even after death because of its perpetuity. All four jurisprudential schools (H _ anaf ıs, H _ anbal ıs, M alik ıs and Sh afiʿ ıs) agreed on the perpetuity of waqf. However, Imam M alik held that it is permissible to donate waqf on a temporary basis (i.e. for a particular period of time) (Aliyu, 2019). Basically, four parties are involved in waqf as follows: (1) Waq ıf (donor); (2) N az _ ir (waqf manager); (3) Mawq uf (subject matter of waqf in the form of an asset or cash); and (4) Mawq uf ʿalayh (beneficiaries) (Kahf, 1999).
Typically, waqf assets are in the form of land and buildings, which makes this kind of waqf donation unaffordable to many segments of society. Cash waqf has come as a good alternative that allows all strata of the society to partake in waqf, regardless of the amount they are willing to donate (Aldeen et al., 2020). Saifuddin et al. (2014) pointed out the noteworthy contributions of cash waqf as follows: (1) It is highly accessible as it allows the donation of a small amount of cash, thus enabling those who cannot endow an asset to participate in cash waqf.
(2) It helps to establish a contingency fund for educational institutions to address cash flow issues.
(3) It can be employed for the improvement of existing waqf assets (waqf lands).
(4) It helps in strengthening Islamic institutions and in making them more autonomous.
The term cash waqf was not known at the time of Prophet Muh _ ammad (peace be upon him). Cash waqf was only introduced at the beginning of the second century Hijrah. Imam al-Zuhri (124H), a leading h _ ad ıth scholar, proposed the waqf of dinars and dirhams to fund the development of daʿwah (Islamic propagation) institutions and to finance social and educational activities for Muslims (Indonesian Waqf Board, 2020).

Application of cash waqf in Indonesia
The latest application of cash waqf in Indonesia is the cash waqf-linked s _ uk uk (CWLS). It was launched by the Indonesian government on March 10, 2020 (Ministry of Finance . It represents a perfect integration between Islamic social finance and commercial finance and is a new financial instrument for financing the Islamic economic sector in Indonesia. The returns of CWLS coupons are expected to be spent on social programs that have a social and economic impact on the community, such as building retina centers in waqfbased hospitals. One of the applications of CWLS is the construction of the Achmad Wardi Eye Hospital in Serang, Banten, which is managed by the Indonesian Waqf Board and Dompet Dhuafa and is the first retina center that targets the poor in the country (Bank . Waqf funds in CWLS can be temporary or permanent, offering more flexibility in the raising of funds from waq ıfs (donors) (Bank . The issuance of CWLS is a manifestation of the government's commitment to support the National Cash Waqf Movement, assisting in the development of social investment and the promotion of productive waqf in Indonesia (Ministry of Finance Indonesia, 2020). In 2021, the Indonesian government issued CWLS Series SWR002. The total subscription for the series was Rp24,141bn (US$1.67m), an increase of 61.89% over the previous year. Retail CWLS SWR002 managed to attract 217 millennial investors with a total order of Rp3.53bn (US$0.24m), which represents an increase of more than 100% over the previous year (Ministry of Finance Indonesia, 2021). Even though the issuance took place during the Covid-19 pandemic, Retail CWLS SWR002 succeeded in attracting the interest of the millennial generation investors. This shows the millennials' support for the Indonesian government's program in developing Islamic social finance, especially cash waqf. Pitchay et al. (2018) state that although there are various types of cash waqf models, innovative cash waqf models are still needed. The model offered by Pitchay et al. (2018) uses the concept of cooperatives and cash waqf to encourage the development of commercial projects on idle waqf lands. The study by Shaikh (2017), on the other hand, proposes the application of waqf as a mode for social and development finance. It suggests the establishment of a waqf-based training center to provide more opportunities to new entrepreneurs. The suggestion from the study of Shaikh (2017) is in line with the implementation of cash waqf in Indonesia by the Al-Azhar Foundation, which provides empowerment program facilities to poor young people through its training center. This program could become a model for Shar ıʿah entrepreneurship training for the Ministry of Manpower of the Republic of Indonesia to consider. With regard to the implementation of cash waqf for microfinance in Indonesia, Ascarya et al. (2016) explained that cash waqf can strengthen the role of Baitul Maal wat Tamwil (BMT) as a holistic financial inclusion agent for the development of micro-businesses. Three BMTs currently play the role of n az _ ir and raise cash waqf contributions to support micro-enterprises in the country. Tohirin (2010) addresses the lack of funding of formal banking institutions to small and medium enterprises (SMEs) by proposing a partnership between SMEs and cash waqf institutions. Another study by Sukmana et al. (2020) proposes channeling cash waqf funds to finance fishermen groups through a cooperative in Surabaya, Indonesia.

Muslim millennials' preferences in the dimension of Islamic economics
Islamic economics provides products and services to fulfill Muslim consumer transaction needs. Muslim millennials are potential consumers who can support the development of Islamic financial institutions. The significant millennials population in Indonesia makes them a vital engine that could contribute positively to the Indonesian economy (IDN Research Institute, 2020). Their large size gives them huge purchasing power. Therefore, they are an attractive target for the development of the Islamic economy (Smith, 2012). Setiawati et al. (2019), Vanany et al. (2019) and Riwajanti et al. (2020) found that there is reasonable knowledge among Indonesian students about h _ al al (Islamically permissible) beverages and food. However, there is a lack of knowledge when it comes to financial services (Riwajanti et al., 2020). Interestingly, Nugraheni and Widyani (2020) found that having a good Islamic economics background does not influence the intention of the Indonesian student to patronize Islamic banks; rather, religiosity and parental recommendations do. Pardiansyah and Rahmat (2018) stressed the impact of social media on millennials' tendency to adopt h _ al al products. Ali et al. (2020) concluded that the intention of Chinese students to buy h _ al al food is highly influenced by the high quality level of h _ al al products, thus increasing satisfaction and building loyalty with companies supplying h _ al al products. In the case of Bangladesh, Tuhin et al. (2020) revealed that millennial consumers' attitudes toward h _ al al purchases depend on personal norms and consumer religiosity, especially with regard to h _ al al cosmetics.

Previous studies
Many researchers have focused on the importance of cash waqf. Historical pieces of evidence also revealed the potentials of cash waqf. Throughout Islamic history, waqf provided several essential services to the public at no expense to the state; it contributed to a significant cut in government expenses. Moreover, it assisted in the process of eliminating rib a (interest) (Cizakca, 1998).
To the best of the authors' knowledge, there is no previous study that has examined the awareness of cash waqf and willingness to contribute among youth in the context of Indonesia. This is particularly important, given that Indonesia is one of the largest Muslimmajority countries and possesses tremendous potential in terms of Islamic philanthropy. Related studies have examined the issue of cash waqf and its various aspects in the context of Malaysia Aziz and Yusof, 2014;Adeyemi et al., 2016;Hasan et al., 2019;Maamor and Mutalib, 2020;Ab Shatar et al., 2021) as well as Indonesia (Ihsan and Ibrahim, 2011;Furqon, 2011;Indahsari et al., 2014;Siswantoro et al., 2018;Iqbal et al., 2019;Berakon et al., 2021).
In the Algerian context, Echchabi et al. (2015) explored the awareness level of waqf among students. Their results showed a good awareness level among the sampled students. Moreover, they found that young students were less aware of cash waqf (i.e. the awareness level was age-dependent). On the other hand, Aziz et al. (2013) found university students' awareness level about waqf banks to be relatively high. They attributed their results to the fact that students usually tend to seek a source of funds to sponsor their studies.
The involvement of young people in philanthropic activities requires huge efforts from all related parties; the availability of a guiding party for them is crucial because they are the main resource of a philanthropic community (Adeyemi et al., 2016;Hasan et al., 2019;Iqbal et al., 2019). Yusof et al. (2013) and Adeyemi et al. (2016) confirmed that a high awareness level reflects positively on the willingness toward cash waqf donations among donors. On the other hand, Islam and Rahman (2017) found a higher willingness level despite the low awareness when they tested the willingness and awareness toward Islamic banking among Indians. They attributed their result to the fact that Islamic banking is a global concept, and Indians are willing to take part in it. The low awareness level, however, related to the sample population's low awareness of the operations of Islamic banking. Berakon et al. (2021) found that the digital Shar ıʿah banking system plays a crucial role in boosting the willingness of Indonesian youths to endow cash waqf. Indahsari et al. (2014) tried to determine the factors that influence zakat, inf aq, s _ adaqah and waqf (ZISWA) payers. They found that external factors mainly influence the payers, namely, belief and trust in the ʿ amil (a person or an institution that collects, distributes and manages ZISWA). In a study by Furqon (2011), the author attributed the lack of awareness on waqf to the n az _ ir's lack of transparency. Transparency means that data related to a certain waqf manager are made publicly available, which reflects positively on public awareness. A further study by Ab Shatar et al. (2021) also stresses the level of trust in the n az _ ir. Their findings depict that trust positively influences the cash waqf contribution in Malaysian Islamic banks.
Badan Waqf Indonesia (BWI) was not formed to take over the waqf assets that have been managed by the existing n az _ irs; rather, the objective of BWI is to nurture n az _ irs so that waqf assets are better managed and more productive, so that they can provide greater benefits to the community in the form of social services, economic empowerment and public infrastructure development. When waqf managers are well distributed in the country, the awareness gap is expected to be reduced among the public. The credibility of the n az _ ir has been a critical issue of concern to many contemporary scholars. The n az _ ir's credibility plays a vital role in the collection of cash waqf; contributors are willing to donate cash waqf when they perceive the n az _ ir to be honest Aziz and Yusof, 2014;Indahsari et al., 2014). In Indonesia, the more accountable the organization is, the more donations they can receive (Siswantoro et al., 2018).
N az _ irs also ought to show transparency in accomplishing the objectives of waqf according to the wishes of the waq ıf. They have to guarantee that waqf will serve for the betterment of the ummah (Muslim nation) (Ihsan and Ibrahim, 2011). Stahlke and Loughlin (2003) opined that publishing a public fund's financial statements can raise public trust.
According to Jati (2017), there is a significant and positive relationship between customers' buying interest and marketing strategies. Hence, good promotion will be reflected in public awareness and subsequently in their willingness to engage with a product or service. In the case of Indonesia, by employing the partial least squares (PLS) regression method, Iqbal et al. (2019) and Hudzaifah (2019) observed that promotion activities have an insignificant impact on the decision of waqf contributors. They attributed their results to the effort needed to obtain information about cash waqf due to the lack of the shared information on the media. However, Qurrata et al. (2020) found that promotion has a significant impact on cash waqf donations; they attributed their results to the n az _ ir's use of media to increase cash waqf involvement. Moreover, this is supported by Aziz and Yusof (2014), who found that mass media have a huge impact on the society. IJIF Attention to cash waqf has increased in the past two decades, especially after the declaration of cash waqf as a permissible practice in both Malaysia and Indonesia in the early 2000s. The subject has been given extra attention by researchers, practitioners and policymakers. This research argues that a deeper understanding of cash waqf practices is a must, particularly among millennials. Many scholars attempted to investigate the awareness and willingness level toward cash waqf from different perspectives (Echchabi et al., 2015;Hasan et al., 2019;Iqbal et al., 2019). However, to the best of the authors' knowledge, there is no previous study that has addressed the subject matter from the millennials' perspective. Hence, this study aims to increase the understanding of n az _ irs as well as BWI on cash waqf from the millennials' perspective. This study will help all the associated entities to reconsider their communication strategies based on the research's results.

Methodology
This research adopted a mixed-method approach to achieve its research goals. It employed both a questionnaire and interview survey to attain a comprehensive understanding from the millennials' perspective as well as from other official institutions concerned with waqf practices in Indonesia. It assumes that interviewing those entities will assist in justifying the results obtained from the questionnaire surveys.

Questionnaire survey
To achieve the research's goals, the questionnaire was formulated under five main sections. The first section concerns the respondents' profile, while the remaining four sections are about awareness, promotion, trust in n az _ irs and willingness. Figure 1 delineates the conceptual framework of this study.
In the last four sections, respondents were asked to demonstrate their responses on a Likert scale ranging from "1 5 strongly disagree" to "5 5 strongly agree." Experts in Islamic social finance and customer behavior were consulted to seek constructive amendments on the content of the questionnaire before the questionnaires were distributed.
The questionnaires in this study were distributed online. The survey was carried out between November 2019 and February 2020. The respondents were not asked to share any personal data. In the questionnaire, it was declared that all the data will be treated confidentially to a large extent.
Before collecting the data, 30 questionnaires were distributed on a pilot basis to ensure its validity. A slight amendment was done on the demographic structuring after the pilot test. Indonesia has four small islands and five big islands, with a total of 34 provinces. The final version of the questionnaire was distributed in Java Island, which is considered the main island of the country. Moreover, Java accommodates the two biggest cities in Indonesia, namely, Jakarta in the west and Surabaya in the east. Of all the islands, Java Island has 56% more millennials than other regions (BPS-Statistics Indonesia, 2018). In addition, the population in Java Island has a more advanced environment because of adequate facilities as compared to other regions; this is seen from the results of a survey conducted by Indonesia Internet Service Association (APJII), which shows that 65% of the total internet users in Indonesia come from Java Island (Budiati et al., 2018). In addition, cash waqf in Java Island enjoys great potential, according to BPS-Statistics Indonesia (2018), given that the population of Java Island has an income of 72% of the total working population in Indonesia.
For the selection of respondents to the questionnaire, certain criteria were taken into account. Only Indonesian Muslims who are between 20 and 40 years of age were the subject of the survey. Out of 534 questionnaires distributed, a total of 484 were returned; only 385 of them (79.54%) were complete and could, thus, be included in the study.
Cronbach's alpha was employed to examine the reliability of the questionnaire's statements (Edgett and Parkinson, 1994;Islam and Rahman, 2017;Islam and Ahmad, 2020). Cronbach's alpha is an inner consistency metric that explains how a set of items are related as a group (Cronbach and Shavelson, 2004). It is used as an indicator to explain the reliability of a scale to confirm whether a scale is unidimensional. Technically, it is a coefficient of consistency. It is considered to be the most suitable method to determine the reliability of multi-item scales (Edgett and Parkinson, 1994). The conceptual formula can be presented as follows: where α: Cronbach's alpha; N: number of items; c: inter-items covariance; v: average variance.
The value of 0.70 or above is deemed acceptable to consider a scale as reliable (Highhouse et al., 2003). Bartlett's test of sphericity was employed to examine the appropriateness of the data. Besides, Kaiser-Meyer-Olkin (KMO) was used to measure the strength of the relationship among the variables (Edgett and Parkinson, 1994).

Interview survey
To confirm the findings of the questionnaire survey and get a more in-depth understanding on issues related to cash waqf, this study also conducted semi-structured interviews with cash waqf experts in various related institutions, namely, with n az _ irs, the Indonesian Waqf Board (BWI), Dumpet Dhuafa (an organization that provides many programs whose main objective is to enhance social justice in Indonesia) and the Indonesian Waqf Education Foundation (YEWI). The interview questions were developed after analyzing the questionnaire respondents' results.
This study relied on purposive sampling to select the interviewees. It is a sampling strategy to select the interviewees in advance based on the research question. To achieve the purpose of this study, experts from different institutions in the country were selected as listed in Table 1. The experts' selection criteria were based on work experience and specialization. Morse (1994) recommended six participants for thematic analysis. Six interviewees were also employed by Thaker (2018). The latter claimed that a small number of participants enables a researcher to reach an in-depth understanding of the matter studied. This study considered the saturation conceptwhen no new insights were given by the respondentsto finalize the number of respondents (Thaker, 2018;Aldeen et al., 2019). As shown in Table 1, six respondents comprised the sample of the interviewees. The Zoom Meeting platform was used to interview the participants. All meetings were recorded, allowing the authors to review them as necessary.

IJIF
Thematic analysis was used to report the data. It allows researchers to summarize the key elements of the data gathered, illustrating the differences and similarities in the data; moreover, its analysis is appropriate for policy development (Braun and Clarke, 2006).

Data analysis and findings
Respondents' profile Table 2 illustrates the socio-demographic information of the respondents. The target area was Java Island. This research covers east, west and central Java. All the respondents are between 20 and 35 years old; only 13.51% of the respondents are below 25 years. The majority of the respondents hold a bachelor degree. Only 23.38% did not obtain a university degree. More than half of the respondents' salaries are between Rp1.5m and Rp3.5m. Table 3 presents the statistical outcomes. Cronbach's alpha for all the sections is more than 0.7. Hence, the scale is significantly reliable (Highhouse et al., 2003). The KMO measure of sampling adequacy statistics is significant at 0.905; the significance level is > 0.6 according to Neill (2008).

Explanatory factor analysis
Bartlett's test of sphericity is employed to confirm the appropriateness of the data (Stewart, 1981). The result of Bartlett's test is large at 6,314.708 and it is significant at 0.001. Therefore, the data are appropriate for factor analysis (Edgett and Parkinson, 1994). The data reveal that the selected variables under each factor are not identical (Edgett and Parkinson, 1994;Islam and Rahman, 2017;Islam and Ahmad, 2020). Figure 2 depicts the screen plot. It manifests all eigenvalues; the first four factors are higher than the cutoff point (> 1). Next, the line goes nearly horizontal (< 1). Therefore, the minimum eigenvalue for each selected factor is immediately higher than 1. Hence, the four factors deserve to be retained in this study to explain four selected factors, namely, awareness, willingness, promotion and trust in the n az _ ir.
Findings Table 4 presents the respondents' responses in terms of awareness of cash waqf and willingness to contribute to cash waqf. It indicates that 82.34% of the respondents are aware that cash waqf is a form of charity. However, a lesser percentage is observed when the authors asked about the asset attached to cash waqf (i.e. money). This might be because most respondents have heard of cash waqf, but they are less aware that cash waqf is donated in the form of money. This is supported by the findings of Riwajanti et al. (2020)  Almost 70% of the respondents strongly agree that cash waqf is a sustainable form of investment, and that it will not be used up. More than 70% of the respondents are also aware of the entities cash waqf should be donated to. However, comparatively, a lower percentage of the respondents are aware of how to donate cash waqf money (45.19% strongly agree). The awareness indicators in general show that Indonesian millennials are aware of the importance of cash waqf as an instrument to uplift social prosperity. However, the results depict that despite the high level of awareness, as equally found by Echchabi et al. (2015) in the case of Algeria, respondents are less interested in donating to cash waqf institutions. Only 46.75% strongly agree to donate cash waqf in the future. These results go against the studies of Yusof et al. (2013) and Adeyemi et al. (2016), who found a high level of willingness among the Indian population despite the low awareness level. These results might be associated with n az _ ir practices, as Indahsari et al. (2014) confirmed. On the other hand, Islam and Rahman (2017) found a low level of awareness associated to a higher level of willingness among Muslims in India. They claimed that the lack of awareness among Indian Muslims motivated them to partake in Islamic financial products.
Millennials might choose another charity channel such as s _ adaqah to donate money; this could explain the low percentage when respondents were asked whether they will choose cash waqf as a mode of charity (only 33.77% strongly agreed). The low percentage attained (30.91% strongly agreed) when the respondents were asked about their willingness to invite others is logical since almost the same percentage was not able to explain cash waqf to others. On the other hand, BWI should aim to promote and support the digital Shar ıʿah banking system because of its positive high impact on the interest of youths to participate in cash waqf transactions (Berakon et al., 2021).
The above-mentioned results were supported by the following observations of expert interviewees: The awareness level about waqf is high, but this does not necessarily reflect a high willingness level. Introducing people superficially to waqf is not enough. We need to elaborate more about its tremendous impact regardless of the amount. We are required to explain more about the flexibility of cash waqf. Up to now, some people still think that this donation should be huge, whereas it is not a must.

Interviewee (C):
We do believe that in a Muslim majority country millennials are aware of the word "waqf" . . ..If a waq ıf wants to donate cash waqf, he believes that this money will be collected and will be invested  Table 3. Factor analysis results before it is spent on beneficiaries . . .. Usually, people prefer to distribute their money by themselves by giving it to the beneficiaries in terms of s _ adaqah.

Interviewee (F):
The millennials have a superficial understanding of cash waqf practices. They are not fully aware of its huge impact. Future advertising campaigns should focus on cash waqf impact that will enhance the willingness not only among millennials but also encourage all Indonesians to donate.  Riwajanti et al. (2020) confirmed. Nevertheless, this study depicts a lower level of awareness among millennials when it comes to cash waqf.     Table 5 exhibits the respondents' responses about the promotion of cash waqf and the level of trust in the n az _ ir. The results depict low level of satisfaction when it comes to cash waqf promotion. Only 31.95% strongly agree that the information about cash waqf submitted by waqf institutions is easily accessed both online and offline, and 24.42% agree that the information shared by the n az _ ir can reach all segments of the society. There is also a low level of respondents' satisfaction on understanding of the advertisements' contents. Only 14.29% strongly agree that advertisements from waqf institutions on cash waqf, both mass media and social media, are very interesting. This can be attributed to the language that is used in the advertisements. Waqf institutions might be assuming that the general public has basic knowledge about Islamic finance and Islamic social finance.

Millennials
With regard to the credibility of the presented contents in the media, about 20% of the respondents disagree that the information delivered through media channels could be trusted. This might be attributed to two factors: first, trust in the n az _ ir; second, the public's comprehension of waqf information. This study appears to be consistent with Iqbal et al. (2019) and Hudzaifah (2019), who found that advertisements concerning waqf in Indonesia are still few. Moreover, cash waqf institutions should ensure that the advertisement contents are interesting and attractive. Cash waqf institutions must also consider the impact of social media on the millennials' attitude toward cash waqf as social media has a tremendous impact on them (Pardiansyah and Rahmat, 2018).
The above-mentioned results were supported by the following observations of expert interviewees: Interviewee (C): Cash waqf promotion is still at its low level compared to zakat and s _ adaqah. It is quite challenging to attract public attention to a relatively new approach of Islamic philanthropy in the country.

Interviewee (F):
Waqf promotion is still at its low level. Thus, we have encountered many people who are interested in zakat instead of waqf. However, waqf is more flexible, which might be attributed to the fact that zakat is a compulsory activity.
To recapitulate, four main elements must be considered in future waqf promotion campaigns, namely: (1) Interesting content in cash waqf advertisements; (2) Easily understood information by all segments of the society; (3) Wide accessibility of information about cash waqf; and (4) Sharing of trustworthy information on cash waqf.
When it comes to trust in the n az _ ir, a very low percentage of disagreement is attained. However, at least 20% could not say anything about their level of trust in the n az _ ir. Cash waqf institutions should exhibit their achievements in serving the community. This is expected to increase the credibility of the n az _ ir (Ab Shatar et al., 2021). It is believed that the BWI should play a greater role in ensuring the n az _ ir's efficiency. This will help in increasing Indonesians' trust in these institutions (Siswantoro et al., 2018). Providing clearer reports for increased understanding of the public about the n az _ ir's influence will contribute positively to the n az _ ir's credibility as supported by Stahlke and Loughlin (2003). This is exactly what has been mentioned by the following interviewees: Interviewee (A): It is not that difficult to be certified as a legal n az _ ir by the BWI. But the challenging part is to win public trust. Roughly, half of waqf trustees in Indonesia are not performing the role of n az _ irs. We do believe that transparency is the most important role of the n az _ ir because cash waqf represents the waq ıf's money and it is his right to know where his money has been channeled.

Interviewee (D):
Forcing strict sanctions on the n az _ ir might not be fair because some of them manage cash waqf for free; hence, they are not professional fund managers. However, they are allowed to deduct 10% from the cash waqf proceeds as profit . . .. Most of them are looking for reward from Allah rather than financial rewards. We presume that greater flexibility will encourage new n az _ irs to register with BWI.

Interviewee (F):
The n az _ ir plays a crucial role in cash waqf participation. Many n az _ irs in Indonesia are legalized as official n az _ irs by Badan Waqf Indonesia, but they do not perform. Hence, millennials think that these IJIF n az _ irs are not using the cash waqf properly. However, there are a few n az _ irs in the country that need to be more transparent, e.g., in sharing information about the collected amount of cash waqf and to whom the waqf profits have been distributed.

Discussion and conclusion
The main goal of this research is to critically examine the awareness and willingness level among millennials in Indonesia. Moreover, the study investigates their perception of cash waqf promotions and their trust in the n az _ ir. It has employed a mixed-method approach to achieve its objectives. First, a questionnaire survey consisting of 385 respondents from the east, west and central Java Island was used. In addition, a post-questionnaire interview with related institutions was conducted to elaborate and confirm the results obtained from the questionnaires. A summary of the four aspects examined in this study is provided in Figure 3.
The results depict a high awareness level about cash waqf among millennials in Indonesia. However, a lower willingness level was found. Furthermore, the results show that millennials still suspect n az _ irs' practices and are not completely satisfied with the current advertising campaigns. This has been confirmed by the interviews as well. The findings from the interviews highlight the main challenges faced by BWI. From the viewpoints of the experts, BWI should have very strict rules on n az _ irs' practices. These will not only enhance trust of n az _ irs among millennials but also gain the general public's trust as well. Thus, the authorities should assign at least one expert from BWI to each waqf institution to ensure the credibility and the efficiency of each n az _ ir. This suggestion is made in light of the fact that not all n az _ irs are working efficiently or are truly aware about how to manage waqf. This is supported by what interviewee (B) said in this respect: . . . However, BWI allowed n az _ irs to collect up to 10 per cent from cash waqf usufruct . . .. Most n az _ irs are not targeting this profit. They rather wish to serve the society by engaging in voluntary work. Besides, not all volunteers are eligible to manage waqf. They neither have the expertise nor the necessary qualifications.
The role of BWI must be maximized so that willingness, awareness and promotion can increase. It will also increase the acceptance of cash waqf by the community, which is more accessible to all levels of the society. This suggestion is evident from the statement of interviewee (E):

Awareness
In general, the millennials exhibit a high awareness level about cash waqf and its importance as an instrument to uplift social prosperity

Promotion
The millennials showed a low satisfaction level when it comes to cash waqf promotion. Interesting content, digestible information for all segments of the society, reachability and data availability should be considered in cash waqf promotion

Willingness
The low percentage attained when the respondents were asked about their willingness to invite others to contribute to cash waqf is logical since almost the same percentage was unable to explain cash waqf to others. Millennials might choose another charity channel to donate money

Trust in Nāẓirs
It seems advisable that cash waqf institutions should exhibit their achievements in serving the community. This is expected to increase the nāẓirs' credibility Cash waqf from the millennials' perspective in Indonesia The expansion of philanthropic deeds should be enhanced by developing programs that focus on civic-minded millennials' engagement . . .. BWI is trying to enhance its collaboration with all entities that enjoy a great influence on the public such as schools, universities and mosques in order to uplift the potential of cash waqf in Indonesia. An important goal at the country level should be the development of a community endowment fund that can be used to meet various needs of the society and to overcome various problems that occur in Indonesia in the economic, educational, health, social and religious fields. BWI should put in place very strict transparency rules in this regard and eliminate those n az _ irs that are not performing efficiently because their non-performance is negatively affecting the trust in n az _ irs' credibility.

Limitations and suggestions for future research
This research only considers millennial Muslims in Indonesia. Future research is highly encouraged to investigate non-Muslims' perspective on cash waqf as even non-Muslims can benefit from cash waqf. Roughly 13% of the Indonesian population is non-Muslim; this is a huge number when it comes to the fourth most populous country in the world. It is advisable as well to conduct a comparative study between millennials in Indonesia and other countries to learn from each other's experience to uplift the potential of cash waqf.