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.Thank you for sending me the (invoice, report, etc.). I can acknowledge that I have received it. No. 'We are in receipt' is a wrong usage. You can choose to acknowledge the receipt of something, but you cannot be in receipt of something. In compliance with 105. CMR 100.310(B), enclosed please find the Holder's Attestation of Acknowledgement and. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. Edit, sign, and share sample acknowledgment receipt online.