WITNESS my hand and official seal. Signature. (Seal). A notary public or other officer completing this certificate verifies only the identity of the individual.Learn what an acknowledgement receipt is and how to create one for your business (with a template and two examples). The completed form will be kept in the record for two years. Next, provide the name and signature of the person acknowledging receipt. For the rest of this guide, we will assume you are filing both steps simultaneously. 3. Complete the necessary forms.