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.Please keep this written acknowledgement of your donation for your tax records. A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations. 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. Discover how to craft donor acknowledgment letters that resonate. Access templates and best practices for donor engagement. Want to learn how to write and structure donor acknowledgment letters? Check out these tips and sample letters to make a greater impact.