Sign the form before a Notary Public or before a Hennepin County District Court Clerk in the Civil Division. Information about notary process in Hennepin County, including how to file a commission and get a document notarized.Most affidavits need to be notarized. This means you'll need to sign your affidavit before a notary public. The affidavits must contain an actual signature; typed signatures will not be accepted. Samples of both forms are included below. Have the form notarized. On a signature affidavit, the signer is confirming that the name he or she is signing with represents the complete, official form of the signer's name. Everything you need to know about notarizing affidavits. Learn what an affidavit is and how to notarize it.