United States Citizenship and Immigration Services (USCIS) recently announced that permanent resident cards (also known as “green cards”) that say “signature waived”,  on the front and back of where a signature would normally be located,  are acceptable documents to prove identity and work authorization for completing the Form I-9 (Employment Eligibility Verification Form).  However, such permanent resident cards must be  unexpired and reasonably appear to be genuine and related to the persons presenting them.  Since February 2015, USCIS has been waiving the signature requirement for foreign nationals who are entering the United States for the first time as lawful permanent residents after having obtained an immigrant visa from a U.S. Embassy or Consulate.  For additional information, please see:   http://www.uscis.gov/news/alerts/did-you-know-green-card-does-not-always-have-signature.