Learn how to easily create your donation receipts and the best practices to follow in the year-end receipts to your donors. Hi Paulette, Typically, you only need to provide Form W-9 upon request.If just confirms your tax id number. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. There are many other reasons to send a receipt after receiving a donation. To be taxexempt under section 501(c)(3) of the Internal Revenue Code, an organization must be organized and operated exclusively for exempt purposes. There is no official IRS form that the exempt organization has to complete. When does the nonprofit need to send the written acknowledgment letter to donors? All sections of the form must be completed. Please type or print all responses.