You must be a lawful permanent resident (green card holder) or a conditional lawful permanent resident (conditional green card holder). You must have the intention to leave the United States temporarily. You must file a Form I-131 and prove supporting documents (your immigration lawyer can file this for you).
What documents do I need to travel outside the United States? In general, you will need to present a passport from your country of citizenship or your refugee travel document to travel to a foreign country. In addition, the foreign country may have additional entry/exit requirements (such as a visa).
To apply for a re-entry permit, you must file Form I-131 (“Application for Travel Document”). This form collects details about your planned trip, your foreign travel since becoming a green card holder, and whether you've been properly filing U.S. tax returns.
NOTE: Each individual seeking to travel and return to the United States must file their own Form I-131 in order to apply for an Advanced Parole Document. USCIS does not permit filing on behalf of another individual under Item 5 on any basis.
If we approve Form I-131 for a CNMI long-term resident, USCIS will issue an Advance Parole Document as evidence of advance permission to travel for CNMI long-term residents, which allows them to travel to any other part of the United States for temporary and legitimate purposes without automatically terminating their ...
You may use this form to apply for parole into the United States for yourself or someone else who is a noncitizen and who is currently outside the United States based on urgent humanitarian reasons or significant public benefit.
Use Form I-131 - Application for Travel Document. For permanent residents, the re-entry permit is valid for two years from the date of issue. For conditional permanent residents, the re-entry permit is valid for two years after the date of issue.