What do you need to include in your donation acknowledgment letter? A gift acknowledgment letter weaves together your nonprofit's appreciation, engagement, and compliance efforts following a donor's generosity.A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations. Gift acknowledgement letters are important for two reasons. First, they provide proof so donors can claim a US tax exemption. Want to learn how to write and structure donor acknowledgment letters? Check out these tips and sample letters to make a greater impact. "Thank you for your contribution of (insert amount of cash donation) on Date. No goods or services were provided in exchange for this contribution. Our top fundraising ideas to raise more for your nonprofit or school include matching gifts, online donations, live auctions, and themed events.