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.They present an opportunity to thank donors in a. 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.