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.Please print this form and complete the information below to ensure we can properly process and acknowledge your gift. 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. Letter from a student: To the donors who have taught me the wonders of humanity, Thank you. What to include in donor acknowledgment letters? Please review the guidelines before completing this form and use the back of the form if additional space is needed.