Learn what an acknowledgement receipt is and how to create one for your business (with a template and two examples). Acknowledgement of Scope for Alteration Projects.§ 415.30) is the recommended method of serving a summons on a known-to-be represented party. Invoiced fees are due within 30 days of the date on the billing letter. The Child Development Center at Mission College is seeking a talented individual to fill the position of Child Development Specialist. Use our free template to acknowledge the receipt of emails, calls, or letters. Please submit documents in PDF format only. Photo attachments are not acceptable.