Donation receipts are important! Here's how to create donation receipts your donors (and the IRS) will love.We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. This step-by-step guide will help you fill out the donation tax receipt and get things in order for tax season. A donation receipt documents the details of a cash or property donation that's gifted to an individual cause or organization. Filling out this form is straightforward. 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.