In this post, I'm breaking down how to write a donation letter. Try our free donation request letter templates!Download our standard template or check out our example letters for events, auctions, schools, and more. Let's walk through common examples of donation letters, starting with a template of the basic format to follow. This is the simplest online donation form template that you can use without any code requirement and accept donations in the easiest way. This document provides a sample format for a letter acknowledging an in-kind contribution or donation. We've compiled common types of donation requests, plus carefully crafted templates that your team can use to jumpstart your outreach. Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS.