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.Want to write an effective donation acknowledgement letter? "Thank you for your contribution of (insert amount of cash donation) on Date. No goods or services were provided in exchange for this contribution. Want to learn how to write and structure donor acknowledgment letters? Check out these tips and sample letters to make a greater impact. Include a separate check for each federation.