On the _______day of ______ in the year_____, before me, the undersigned notary public, personally appeared. The sample acknowledgement letters for receipt of payment provided below can be used as format templates for official and personal purposes.An acknowledgment is one of the most common types of notarial acts, but it often confuses Notaries. Here are 5 steps to performing an acknowledgment. What do you need to include in your donation acknowledgment letter? Sample Donor Acknowledgement Letter for Cash Donation. Acknowledgment of receipt for payment​​ Use this template to acknowledge the receipt of a payment. Dear (Recipient's name), I hope you are well. If you are writing with a request, information or invitation, address your letter to the Royal's secretary or Equerry.