If you are a U.S. lawful permanent resident (LPR), there are at least three situations where applying for a reentry permit may be beneficial: (a) if you will be abroad for one year or more; (b) if you will be abroad for more than six months for two consecutive years; and (c) if you have been warned by U.S. Customs and Border Inspection (CBP) officer that you are at risk of abandoning your permanent resident status.