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.First paragraph: Immediately thank donors for their gift. Want to learn how to write and structure donor acknowledgment letters? Check out these tips and sample letters to make a greater impact. This receipt is issued to individuals who have donated cash or payment, personal property, or a vehicle and seek to claim the donation as a tax deduction. Want to write an effective donation acknowledgement letter? Include the nonprofit's EIN so the the donor can to check the charity's tax-exempt status with the IRS. While MNA does not offer direct services for nonprofit start-ups, we do offer a variety of resources to help you get your nonprofit up and running. Want to learn how to write and structure donor acknowledgment letters?