What do you need to include in your donation acknowledgment letter? Please use this letter as your receipt and retain it for your records.Donations made to WAKE may be tax deductible. No goods or services were received in consideration of this gift. This step-by-step guide will help you fill out the donation tax receipt and get things in order for tax season. It helps ensure we track your donation and are able to send a tax acknowledgment letter. Include the nonprofit's EIN so the the donor can to check the charity's tax-exempt status with the IRS. Samaritan's Purse is a tax exempt 501(c)3 organization. Legal Name: Samaritan's Purse. Fill out the form below or print a donation form and mail your contribution.