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 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.