What do you need to include in your donation acknowledgment letter? A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations."Thank you for your contribution of (insert amount of cash donation) on Date. No goods or services were provided in exchange for this contribution. When acknowledging these donations, include the name of the donor, the number of shares, the name of the security, and the date when the transfer was completed. Affidavit of Motor Vehicle Gift Transfer.