Payee's Phone Number. An affidavit of forgery is an official declaration that a fraudulent act was committed.It should be completed, notarized, and sent to notify institutions. I am first duly sworn and state I am: Name. Washington State notaries are more than just signature verifiers; they're trusted professionals who ensure that documents are executed correctly. In the absence of additional information, the loss is your bank's when you receive the affidavit of forgery.