Important: If you are about to exhaust regular UI due to H. Helene, you need to answer questions to possibly continue being paid. ACKNOWLEDGMENT. County, North Carolina.What is required in a donation acknowledgement letter? Please note that this is a secure facility. Customers needing assistance with their unemployment insurance claim should contact us via phone at 888-737-0259. What do you need to include in your donation acknowledgment letter? The sample acknowledgement letters for receipt of payment provided below can be used as format templates for official and personal purposes. I,. , a Notary Public for said County and. This document provides guidelines for writing an acknowledgement letter. An acknowledgement letter recognizes someone's efforts or contributions.