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A Passport Number Is Enough - the Rule Says So in Terms

The federal rule that makes banks ask for identification also settles what a foreigner may offer. Before opening an account a bank must obtain a name, a date of birth, an address and an identification number - and for a person who is not a United States person, the rule accepts a taxpayer identification number, or a passport number with the country of issuance, or an alien identification card number, or the number and country of any other government-issued document evidencing nationality or residence and bearing a photograph. A social security number is one option among several and is nowhere required. The address may be the street address of next of kin or another contact for someone with no residential or business address of their own.

Verified with official sourceMonitor - can change2026-10-09

At a glance

A social security number
Not required - it is one of several options

31 CFR 1020.220(a)(2)(i)(A)(4)(ii) lists the alternatives for a non-U.S. person.

Passport
Accepted, with the country of issuance
Alien identification card
Accepted
Any other government document
Accepted if it evidences nationality or residence and bears a photograph
No address of your own
The street address of next of kin or another contact may be used

Requirements

  • A name, a date of birth and an address
  • One of the identification numbers the rule lists, of which a passport number is one

Exceptions by origin

No exceptions recorded

Nothing we have read treats any nationality differently for this topic. The rule above applies to everyone.

What the law says

Text layer - verbatim verified31 CFR § 1020.220, Customer identification program requirements for banks · 31 CFR § 1020.220(a)(2)(i)(A)
«the bank must obtain, at a minimum, the following information from the customer prior to opening an account: ( 1 ) Name; ( 2 ) Date of birth, for an individual; ( 3 ) Address, which shall be: ( i ) For an individual, a residential or business street address; ( ii ) For an individual who does not have a residential or business street address, an Army Post Office (APO) or Fleet Post Office (FPO) box number, or the residential or business street address of next of kin or of another contact individual; or ( iii ) For a person other than an individual (such as a corporation, partnership, or trust), a principal place of business, local office, or other physical location; and ( 4 ) Identification number, which shall be: ( i ) For a U.S. person, a taxpayer identification number; or ( ii ) For a non-U.S. person, one or more of the following: A taxpayer identification number; passport number and country of issuance; alien identification card number; or number and country of issuance of any other government-issued document evidencing nationality or residence and bearing a photograph or similar safeguard.»

The minimum information and the list of what a non-U.S. person may give as an identification number. The alternatives are the point: the rule never asks for a social security number.

Read it at the source
About this source

The continuously updated edition of the federal regulations, with an API that renders a single section as HTML at an address naming the title, part and section. Each page states the date the text is current to.

Standing: Maintains the text in force

Cannot be cited for: The eCFR is an editorial compilation and is not the official legal edition: the annual Code of Federal Regulations and the daily Federal Register are. A regulation says nothing about the statute's own exceptions, and most of what a reader wants from federal immigration practice is in neither - it is in agency manuals and in state law.

We re-read it every 90 days. More about this source

Practical notes

This is the federal floor. A bank may ask for more as a matter of its own policy, and many do; the rule sets what it must obtain, not what it may.

Verification is a separate paragraph of the same rule and may be done through documents or other means, which is where practice varies most.

Sources1 · all accessed 2026-10-09
  • consolidates
    31 CFR 1020.220, customer identification program for banks

    Electronic Code of Federal Regulations, Office of the Federal Register

    About this source

    The continuously updated edition of the federal regulations, with an API that renders a single section as HTML at an address naming the title, part and section. Each page states the date the text is current to.

    Standing: Maintains the text in force

    Cannot be cited for: The eCFR is an editorial compilation and is not the official legal edition: the annual Code of Federal Regulations and the daily Federal Register are. A regulation says nothing about the statute's own exceptions, and most of what a reader wants from federal immigration practice is in neither - it is in agency manuals and in state law.

    We re-read it every 90 days. More about this source