It is a credibility test. Marriage records are on file at the county probate courts.A Marriage Affidavit is a sworn statement affirming the date and validity of a marriage. Ohio Affidavit Templates. Use our Affidavit template to swear to the truthfulness of a statement or fact. Below is a template that your friends can follow as they write their sworn statement. Get a free affidavit of marriage sample with 360 Legal Forms. Get customized and printable legal forms for businesses and individuals. Your affidavit of marriage will act as your sworn statement that you were validly married on the date and at the location specified. An affidavit of marriage is a legal document and a sworn statement submitted to the court or another institution, to verify that two people are married.