What do you need to include in your donation acknowledgment letter? Fill in the required fields and attach a receipt of the donation.Donations can be recorded for your own tracking purposes or to apply for a matching gift. A donation acknowledgment letter (sometimes called a donation receipt or thankyou letter) is an email or paper that recognizes a charitable contribution. Today we're going to talk about drafting donor acknowledgment letters. This is a subject that is often pretty simple and straightforward. If you've donated to NJLERC, below please find a Donation Receipt form and a Donation Letter form that you can download and fill out.