NY Times article: Green Card Marriage Interview: Can You Pass It?

Every marriage is tested at times, some more literally than others.

The marriages of immigrants to American citizens must stand up to the scrutiny of the United States government, which is always on the lookout for people gaming the system for a green card.

When did you meet? Does your spouse have a tattoo? What movies did you watch when you started dating? (One tip: Don’t say “Green Card.”) Couples must prove that their relationships are real by providing proof they live together or photographs of their time together.

Still, officials and immigration lawyers caution that answering all of the questions correctly doesn’t necessarily result in a green card. And lately, the bar has been a lot higher for immigrants in the country illegally.