We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. A donation receipt documents the details of a cash or property donation that's gifted to an individual cause or organization.Toll Free Number: 1.888.4.GOODWILL. This should include a unique ID or membership number, the donation amount, your organization's name, the date they made a gift, and their payment method. Date. Agency Number. This free template instantly generates a PDF receipt that can be downloaded, printed for your records, or automatically emailed to donors for their tax returns.