My spouse is a Kenyan citizen who has migrated to the states on a K-1 visa. We were married shortly after he arrived and are now working on filing his I-485. I just want to make sure that were are not overlooking an A#, but we can't find it anywhere including on the Visa nor Customs & Boarder Patrol passport stamp where he was Admitted at the port of entry. He was not given any documents when he entered. Are we missing something?