U.S. permanent residents sometimes are asked by their employers to undertake a temporary foreign assignment. If such assignment might last longer than six months, it is advisable for the permanent resident to apply for and obtain a re-entry permit issued by the Department of Homeland Security. We make this recommendation even though the permanent resident can technically use an unexpired permanent resident card ("green card") to re-enter the U.S. after foreign travel of less than 365 continuous days.

here are several reasons for our recommendation. First, a returning permanent resident has the burden of proving that he or she has not abandoned the intention to reside permanently in the U.S. The filing of a re-entry permit application serves to record the permanent resident's intention to return to the U.S. after the temporary assignment abroad and helps to protect the returning permanent resident from a challenge at the port of entry by a U.S. Customs and Border Protection ("CBP") official. Sometimes the employer may unexpectedly extend an employee's foreign assignment so filing a re-entry permit application is generally advisable if, again, the assignment is expected to last a half year or longer. Second, according to U.S. Citizenship and Immigration Services ("USCIS") rules, there is a rebuttable presumption that an absence from the U.S. of six to 12 months’ duration will break the continuity of residence required for U.S. naturalization eligibility. The issuance of a re-entry permit helps to overcome this presumption.

While filing a re-entry permit application is typically a straightforward exercise, USCIS now requires re-entry permit applicants to provide biometrics (fingerprints, photograph, and signature specimen) at an Application Support Center before they first depart the U.S. Historically, re-entry permit applicants could simply file the application, verify the delivery by overnight courier, and then depart the United States. Having to remain in the U.S. to receive the biometrics appointment notice may pose a hardship for some applicants because typically USCIS takes several weeks (or longer) to issue biometrics appointment notices on many types of cases. USCIS has said that it might deny applications where the applicant departs the U.S. before receiving the biometrics appointment notice and providing biometrics. USCIS has suggested that applicants should apply at least 60 days in advance of their U.S. departure date to avoid a problem.