If you return this form to the sender, service of a summons is deemed complete on the day you sign the acknowledgment of receipt below. The sample acknowledgement letters for receipt of payment provided below can be used as format templates for official and personal purposes.Learn what an acknowledgement receipt is and how to create one for your business (with a template and two examples). We'll show you how with 5 acknowledgment email reply samples and a completely customizable template. The completed form will be kept in the record for two years.