United States Permanent Resident Card
Overview
 

United States lawful permanent residency refers to a person's immigration status: the person is authorized to live and work in the United States of America on a permanent basis.

A United States Permanent Resident Card (USCIS Form I-551), formerly Alien Registration Card or Alien Registration Receipt Card (INS Form I-151), is an identification card attesting to the permanent resident status of an alien
Alien (law)
In law, an alien is a person in a country who is not a citizen of that country.-Categorization:Types of "alien" persons are:*An alien who is legally permitted to remain in a country which is foreign to him or her. On specified terms, this kind of alien may be called a legal alien of that country...

 in the United States.
 
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