The Resident Alien (or Green) Card

Commonly called a "Green Card", the resident alien card is issued by the DHS to foreign nationals who have been granted permission to reside and work in the U.S. on a permanent basis. Green Card holders are also referred to as Lawful Permanent Residents (LPR or PR) and they have an immigrant visa as opposed to a non-immigrant visa. If an individual presents a Resident Alien Card as verification of employment eligibility, no other documentation is required. Permanent residents do not have I-94 cards.

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Green Card descption