[mifreewil]

“To open a checking or savings account, the bank or credit union will need to verify your name, date of birth, address, and ID number. An ID number can be a social security number or an Individual Taxpayer Identification Number (ITIN).“

Having spent more than a few years in FinTech, I know these things can vary from company to company as companies generally are required to design their own “risk-based” policies for AML and KYC.

[Casseres]

"can be" not "must be". Driver License number or just about anything else is legal, it's just up to the bank whether or not they want to accept it.