Social Security Card or Border Crossing Card
This can include your Social Security card, a W-2 or even a paycheck stub, if it shows your full name and entire Social Security number. Don’t have your Social Security card? You can visit your local Supplemental Security Income (SSI) office first to get number verification, then show this verification instead. If you're not a US citzen, you can provide your Border Crossing Card (B1/B2 VISA/BBC).