Learn how to complete a marriage affidavit template with our stepbystep guide for newlyweds. By signing this Affidavit below, you represent that you have established a valid marriage under common law.I verify that the statements made in this affidavit are true and correct. I understand that false statements herein are made subject to the penalties of 18 Pa. A Marriage Affidavit is a sworn statement affirming the date and validity of a marriage. You must complete the. 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. Examples of proof are affidavits from the officiant, witnesses, bridal party, photographs and a copy of the program. Make sure you complete the caption of each Affidavit of Consent. 2.