I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. The purpose of letters of acknowledgment is to provide proof that you have received specific documents or a specific type of request.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. How do I write a letter to acknowledge receipt? Click on the sample letter that may be used to acknowledge receipt of an applicant's resume or application. Simple acknowledgment email reply sample. 2. Acknowledgment email sample to confirm receipt of documents. 3. Notice of Acknowledgment of Receipt of Summons and Complaint. Dochub is the best editor for updating your documents online.