How do you fill out an acknowledgment letter? The certificate of acknowledgment (PDF) must be in the form set forth in California Civil Code section 1189.(Name): We are acknowledging receipt of your application on (date of receipt). A letter template you can use to acknowledge that you have received important documents. Access to Forms The Superior Court of Orange County offers several options to assist the public in completing court forms. Thank you for sending me the (insert details) documents. I can confirm that I received them on (insert date). Access to Forms The Superior Court of Orange County offers several options to assist the public in completing court forms. How to write an Acknowledgement Letter? An easy way to start is to download this Sample Acknowledgment Letter of Receipt template now!