The I-131 application allows you to travel outside of the United States while maintaining your permanent residency status. Read these instructions carefully to properly complete this form.If you need more space to complete an answer, use a separate sheet of paper. Use Form I131 Application for Travel Document. For permanent residents, the re-entry permit is valid for two years from the date of issue. International travelers and U.S. citizens are required to present a valid passport upon entry into the U.S. Learn more information.