What do you need to include in your donation acknowledgment letter? A donation acknowledgment letter (sometimes called a donation receipt or thankyou letter) is an email or paper that recognizes a charitable contribution.Take a look at what makes a good thank you letter for a donation or use one of our provided templates to help get you started. When acknowledging these donations, include the name of the donor, the number of shares, the name of the security, and the date when the transfer was completed. A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations. In this guide, we'll explore the ins and outs of donor recognition and discover how your organization can create an effective acknowledgment strategy.