Bonafide marriage evidence:
- IDs / DLs with matching address
- Joint tax return transcripts
- Joint lease contract / mortgage statements
- Bank statements for joint checking, savings, brokerage, accounts
- Evidence of any other jointly owned assets - car title etc
- Utility bills showing both names
- Insurance policies (health, car, homeowners, renters etc) showing both names
- Birth certificates of kids born in this marriage
- Flight, hotel, cruise reservations with both names
- Photos with friends and family
- Joint memberships (Costco, gym, whatever else)
- Living wills listing each other
- Correspondence (letters, cards etc) addressed to both of you
- Any other evidence of bonafide marriage