What do you need to include in your donation acknowledgment letter? A good donor acknowledgment letter is both a transaction record and a donor engagement opportunity.Here's how to write one. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. This guide discusses some important topics about an acknowledgment receipt and gives useful acknowledgment receipt examples. Fill out your contact information and the details of your gift below. Once your gift is verified, we'll send your letter to the address you listed below. Donation Receipt Template Download, A4, US Letter Size, Easy Editable in Excel and Google Sheets, Simple Template for Charity Foundation. 2) if you end up using it, you need to mention why you're doing so and how long you would in the donation receipt. Provide a written acknowledgment to the item's donor.