Documents that establish lawfully admitted for permanent residence (LAPR)
-- I-551 card (It's the Form number of the "green card")
NOTE: Some LAPR aliens have conditional 2-year I-551s (Alien Registration Receipt Card), subject to the limitation that they must apply for removal of the conditional basis 90 days before the second anniversary of the admittance date to the United States. A conditional I-551 is identified by an expiration date 2 years later than the admittance/adjudication date is acceptable proof of permanent residency.
-- Temporary I-551
Temporary evidence of immigrant status is issued for an alien to use
until the permanent I-551 card is received. This may be a stamp in the individual's passport or on the I-94.
-- Machine Readable Immigrant Visa (MRIV) with temporary I-551 language
Note: The MRIV shows the alien's identification number (“A” number) as the “Registration Number” in the upper right-hand corner of the MRIV.
The MRIV in an unexpired foreign passport that shows the statement “UPON ENDORSEMENT SERVES AS TEMPORARY I-551 EVIDENCING PERMANENT RESIDENCE FOR 1 YEAR and is endorsed with an admission stamp is the same as a valid Temporary I-551 stamp and is valid for one year from the date of endorsement by the admission stamp.
Example:
If the admission stamp shows a date of entry into the U.S. as January 4, 2004, the expiration of the temporary I-551 status will be January 3, 2005. The expiration date on the MRIV should not be used to determine when the temporary I-551 status expires. The expiration date on the MRIV only shows how long the MRIV is valid not how long the alien's temporary I-551 status is valid.
RM 00203.410 Evidence of Alien Status for an SSN Card for an Alien Lawfully Admitted for Permanent Residence:
http://policy.ssa.gov/poms.nsf/lnx/0100203410