Instructions: Use the templates, or a similar form, on pages 2 and 3 to document inkind contributions. Inkind. In this post, I'm breaking down how to write a donation letter.Let's walk through common examples of donation letters, starting with a template of the basic format to follow. This document provides a sample format for a letter acknowledging an in-kind contribution or donation. 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. In this article, we'll cover how to write a donation letter. Use one of our six sample donation request letter templates to get started. First, there is the in-kind donation request sent to a potential donor.