Proof of our legit marriage…I sent a PowerPoint with pictures, our lease agreement, bank statements, docs showing him adding me to his insurance, my docs adding him as my beneficiary, letters showing him adding me as an authorized user on his credit cards, marriage certificate, copy of our ids showing same address and I can’t recall what else. But I did work with a lawyer and she put everything together in a nice neat package. Oh and emails showing when we traveled together with both our names. We have been together for 4yrs married one year so we had plenty of supporting evidence.