Happened to my wife’s close friend as she crossed the border. They found years-old texts between her and her ex-bf joking about marrying for a green card and she was denied entry into the US and given a 10 year ban for immigration fraud even tho she had been living there under H1B (which was close to expiring) and had to fly back to her home country with just the clothes in her suitcase. Her sister who was a citizen had to sell all her things for her. It was a disaster.