Begin with a professional letterhead or logo. In today's video I'm going to show you how to complete a California Acknowledgement and a California Giraffe.The sample acknowledgement letters for receipt of payment provided below can be used as format templates for official and personal purposes. Thank you for sending me the (invoice, report, etc.). I can acknowledge that I have received it. Donation acknowledgment letters are more than just a donor tax receipt. There are certain items to include for tax purposes. WITNESS my hand and official seal. Signature. (Seal). A notary public or other officer completing this certificate verifies only the identity of the individual. I am here doing a um mock notarization for an acknowledgement and durat i want to show you how to fill out both of them.