A gift acknowledgment letter weaves together your nonprofit's appreciation, engagement, and compliance efforts following a donor's generosity. What do you need to include in your donation acknowledgment letter?Gift acknowledgement letters are important for two reasons. First, they provide proof so donors can claim a US tax exemption. When acknowledging these donations, include the name of the donor, the number of shares, the name of the security, and the date when the transfer was completed. How to manage memorial donations. For example: "You have played a huge role in the success of our organization for years. Donors will love receiving these out-of-the-ordinary donation appeals and hanging them on their refrigerators after submitting their gifts! Your generous donation has truly helped lift a burden off our shoulders. Giving receipts is an important practice since 501(c)(3) donations are tax-deductible to the donor.