Make the steps below to complete Marriage Affirmation Petition and Order - Fairfax County Government - fairfaxcounty online easily and quickly. The statements above are true and accurate to the best of my knowledge and belief.Affidavit: An affidavit is a sworn written statement that is the same as testifying under oath in court. A Marriage Affidavit is a sworn statement affirming the date and validity of a marriage. All affidavits must be notarized. However, declarations under the penalty of perjury are also permitted and need not be notarized. I have read and can verify the allegations in the Complaint, which is attached. 4. The Plaintiff, Defendant and I are all over the age of 18. 5. In Party One of the Marriage Information section of the application, list the name of the person requiring the single status letter. Affidavit: An affidavit is a sworn written statement that is the same as testifying under oath in court.