What do you need to include in your donation acknowledgment letter? Donation acknowledgment letters are more than just a donor tax receipt.There are certain items to include for tax purposes. A donation acknowledgment letter is a type of donor letter that you send to donors to document their charitable gifts and donations. This step-by-step guide will help you fill out the donation tax receipt and get things in order for tax season. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. THEA owns, maintains, and operates the Selmon Expressway, the Brandon Parkway, Meridian Avenue, and the Selmon Greenway. A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations. THEA owns, maintains, and operates the Selmon Expressway, the Brandon Parkway, Meridian Avenue, and the Selmon Greenway. Requests are processed in the order in which they are received.