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. Get your guide to writing donation thankyou letters supporters will remember and more thoughtful ideas to show appreciation. 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. A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations. Organization's name; Donation description.