A license to be married may be purchased at the County Clerk-Recorder's Office. OFFICIANT ADDRESS – The marriage officiant must enter their complete mailing address, including city, state and ZIP Code.Box 29E Public License. ALL information on the marriage license MUST be legible, unambiguous and reproducible. Look up a court case or citation. Find a traffic ticket or court case using the county court's website. It comes from a past tense form of the Latin verb affidare, meaning "to pledge"; in Latin, affidavit translates to "he or she has made a pledge. For out-of-state residents, apply for a license in the Indiana county where the marriage will be solemnized. An application for a marriage license in Contra Costa is an affidavit. View a sample Marriage License (PDF, 314KB, 1pg.).