You can submit following documents (if applicable): - Joint Bank statement - Joint Apartment/house Lease - Joint Vehicle insurance - Any shared assets like Car, Land, or any property with your and your spouse's name on docs - Medical/Dental insurance if spouse is dependent - Utilities bill/Bank statement issued on physical addresses that both of you share together - Honeymoon pictures or travel pictures together - Affidavit of your legit marriage by family, friends and relatives (I heard, Normally, this is only required in cases when IO doubt the marriage)