Supporting documents may include but are not limited to:
Two passport-style photos
A copy of your birth certificate
A copy of your government ID with a photograph
Form I-864 (for certain applications)
Proof of your immigrant category
Proof that you have maintained a lawful status since arriving in the U.S.
Proof of relationship to the primary applicant (such as a birth certificate, marriage certificate or adoption decree)
Supporting documents from an employer