Once of the most important pieces of the fiance visa petition is the supporting documentation.
You will need to provide a number of supporting documents and a variety of information about you and your fiance. Here is a list of the items most couples will need:
1. Photocopy of your U.S. Passport (copy all pages, even the blank ones); U.S. birth certificate; OR Certificate of Naturalization.
2. If you or your fiance were previously married, certified copies of divorce decrees from any prior marriages. You should be able to obtain this from the court where the divorce took place.