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. A perfect yearend donation letter can boost your fundraising campaign. "Thank you for your contribution of (insert amount of cash donation) on Date. No goods or services were provided in exchange for this contribution. First paragraph: Immediately thank donors for their gift. The acknowledgment letter serves as the donor's record, and it fulfills the organization's obligation to the IRS. The IRS advises not to include values since it's up to the donor to determine the value of inkind contributions. Email and Letter Personalization.