Nonprofit organizations must apply for exemption with the Comptroller's office and receive exempt status before making tax-free purchases. All donation requests must be submitted online.Written or phone requests are not accepted. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. This gift supports Penn Wrestling and the development of our program. For federal income taxation purposes, this letter acknowledges your contribution. All charitable contributions will be granted only to organizations with 501 (c) (3) status no thirdparty requests. Donation requests are usually filled within 30 days of the event date whenever possible. Requests must be received at least four (4) weeks prior to your event. Tax Issues for Nonprofits​​ Neither a nonprofit corporation nor an unincorporated nonprofit association is automatically exempt from federal or state taxes.