Explore the importance of acknowledgment letters in professional communication. Use our free template to acknowledge the receipt of emails, calls, or letters.Examples of 'acknowledge' in a sentence. If you acknowledge a message or letter, you write to the person who sent it in order to say that you have received it. The acknowledgment of receipt shall be signed and returned to the Chief. A Bidder, prior to submitting his Bid, shall ascertain that he has received all Addenda issued, and shall acknowledge receipt of same in the Bid Form. Potential Offerors shall hand deliver, email, registered or certified mail the. Those bidders who do not complete a particular section in a very real sense maintain the option to keep shopping around for the particular item.