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.Thanks for your support of our cause and mission. Please fill in the information below to receive an official letter of acknowledgement for your donations. Acknowledge this gift to: A letter will be mailed to the individual or family for donations given in memory, honor, or thanksgiving (include name and address). 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. All donors receive a charitable tax receipt or acknowledgement for all donated items upon acceptance of approved and completed form. In this article, we'll cover how to write a donation letter. Use one of our six sample donation request letter templates to get started.