Affiant confirms that the statements contained herein are true and correct. Executed this day of.To provide an alternative means for couples that are common-law married to provide a sworn statement declaring their informal marriage and the date of marriage. Learn how to complete a marriage affidavit template with our stepbystep guide for newlyweds. Aspx) and just request one from them. Click on the words on the links below and you can enter information directly into the form before printing it! 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. Both affidavits and declarations are types of sworn statements. They file their taxes jointly and present themselves as a married couple to their friends and family.