In this post, I'm breaking down how to write a donation letter. This document provides a sample format for a letter acknowledging an in-kind contribution or donation.Let's walk through common examples of donation letters, starting with a template of the basic format to follow. Donate. Make a Donation. Fill out my LGL Form! Try our free donation request letter templates! Download our standard template or check out our example letters for events, auctions, schools, and more. 1. Print the template on letterhead. They will fill in a form explaining how you are feeling. You can also refer yourself online.