Your acknowledgment receipt should contain the names of the issuing party and the person receiving the document. The sample acknowledgement letters for receipt of payment provided below can be used as format templates for official and personal purposes.We'll show you how with 5 acknowledgment email reply samples and a completely customizable template. If you are writing with a request, information or invitation, address your letter to the Royal's secretary or Equerry. Explore the importance of acknowledgment letters in professional communication. Use our free template to acknowledge the receipt of emails, calls, or letters. Explore the importance of acknowledgment letters in professional communication. Use our free template to acknowledge the receipt of emails, calls, or letters. 2. Please do not include this letter to refund request to avoid inconvenience during check pick up). A thank you for your donation letter is a letter that you send to acknowledge the receipt of a donation.