Learn what an acknowledgement receipt is and how to create one for your business (with a template and two examples). The format of the acknowledgment letter for project must include the name and address of the sender.Also, the present date has to be mentioned. I acknowledge further that the law office of. Has not retained a copy of my file. Edit, sign, and share pa acknowledgment online. No need to install software, just go to DocHub, and sign up instantly and for free. I acknowledge further that the law office of. Has not retained a copy of my file. You will receive an official notice of suspension letter in the mail.