What is an Affidavit of Identity? An affidavit of forgery is an official declaration that a fraudulent act was committed.It should be completed, notarized, and sent to notify institutions. An individual taking full responsibility for an error, change, or removal of information on ownership documents must complete and sign the Erasure Affidavit. This affidavit is made voluntarily for the purpose of establishing the fact that my signature is a forgery. 7. Do you know who forged your signatures? Affidavit of a forged signature on a document.