How long is a new permanent resident visa good for?
My mother, who lives in Brazil, was just approved for U.S. permanent residency through me. (I’m a U.S. citizen.) She is elderly, however, and needs to sell her house and pack up or sell her possessions before moving here to join us. We are worried that this will take several months. How long does she have before her visa is no good anymore? What’s the best way to handle this?