Documents to confirm your immigration status:
Permanent Resident Card, "Green Card" (I-551)
Reentry Permit (I-327)
Refugee Travel Document (I-571)
Employment Authorization Card (I-766)
Machine Readable Immigrant Visa (with temporary I-551 language)
Temporary I-551 Stamp (on Passport or I-94/I-94A)
Foreign passport
Arrival/Departure Record (I-94/I-94A)
Arrival/Departure Record in foreign passport (I-94)
Certificate of Eligibility for Nonimmigrant Student Status (I-20)
Certificate of Eligibility for Exchange Visitor Status (DS-2019)
Notice of Action (I-797)
Document indicating a member of a federally recognized Indian tribe or American Indian born in Canada
Certification from U.S. Department of Health and Human Services (HHS) Office of Refugee Resettlement (ORR)
Document indicating withholding of removal (or withholding of deportation)
Office of Refugee Resettlement (ORR) eligibility letter (if under 18)
Resident of American Samoa Card