This letter is to acknowledge receipt of your complaint (Complaint No. ______) about safety and health hazards at. (establishment name and address).Address customer complaints professionally with our acknowledgment of customer complaint letter template. Create and download a letter for free! Notice of Acknowledgment of Receipt of Summons and Complaint. Dear Click or tap here to enter text. This letter is to acknowledge receipt of your grievance on (date) regarding services you received from (name provider). 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. (877) 713-6182 or mail it to the address listed above.