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Abstract. Although offering gifts to encourage prosocial behaviors is a popular daily strategy, its underlying mechanism remains unknown. This study investigated the effect of thank-you gifts on charitable giving in laypeople’s beliefs ( N = 1,293). Study 1 showed that laypeople believe thank-you gifts increase charitable giving. Study 2 found that laypeople believe thank-you gifts increase both charitable giving and positive emotions of donors. Study 3 further showed that laypeople’s anticipation of donors’ emotional gain might play a mediating role in the effect of thank-you gifts on charitable giving. Study S1 found that participants’ donated amounts in the benefit-to-others thank-you gifts condition exceeded other conditions on actual donation behavior. These findings emphasize the emotional value of the gift in laypeople’s beliefs.