“…Research on smoking cessation hotlines has consistently shown that offering incentives, such as free nicotine patches or gum, substantially increases call volumes to these quitlines (An, Schillo, Kavanaugh, Luxenberg, et al, 2006; An, Schillo, Kavanaugh, Lachter, et al, 2006; Anderson, Kirby, Tong, Kohatsu, & Zhu, 2018; Bauer, Carlin-Menter, Celestino, Hyland, & Cummings, 2006; Cummings et al, 2006; Hood-Medland et al, 2018; Momin et al, 2014; Tong et al, 2023; Vijayaraghavan et al, 2018). Although several organizations operate family planning call centers (Antillon, Webbe, & Husken, 2022; Corker, 2010; Kulathinal, Joseph, & Saavala, 2019; Yagnik et al, 2015), to the best of our knowledge, there are no studies that examine whether e-vouchers can be effective for increasing use of such family planning hotlines.…”