Get a free affidavit of marriage sample with 360 Legal Forms. Get customized and printable legal forms for businesses and individuals.Full names, addresses and dates and places of birth of both applicants. A Marriage Affidavit is a sworn statement affirming the date and validity of a marriage. To complete the affidavit, enter the current full legal name or names of the spouses involved. If you're not finding the forms you need, contact us at (801) 238-7990 or Click here to contact the web navigator. How Do You Write an Affidavit of Marriage? You can use an affidavit of marriage as a sworn statement that you are married and to name who you are married to.