Affidavit of Check Forgery - Complete, print, sign and mail this form to Star One Credit Union per instructions below. I am first duly sworn and state I am: Name.If your "signature" is on the affidavit and you didn't sign it, then someone probably forged your signature. Information on obtaining copies of birth certificates from the New York State Department of Health. If you witness a fellow Notary committing a crime, find out how you can report it and what information you will need to provide.