Account Number


DEFINITION of 'Account Number'

The primary identifier for ownership of an account, whether a vendor account, a checking or brokerage account, or a loan account. An account number is used whether or not the identifier uses letters or numbers.

BREAKING DOWN 'Account Number'

At one time, it was common to use a Social Security number as the primary identifier, particularly for employees (for payroll or human-resources identification). Because of the proliferation of identity theft, however, this practice has been all but eradicated. It is not a good idea to use a Social Security number for any type of account, or as a user name or password for electronic identification.

  1. Checking Account

    A transactional deposit account held at a financial institution ...
  2. Social Security Number - SSN

    A nine-digit number assigned to citizens, some temporary residents ...
  3. Identity Theft

    The crime of obtaining the personal or financial information ...
  4. Savings Account

    A deposit account held at a bank or other financial institution ...
  5. Liability

    A company's legal debts or obligations that arise during the ...
  6. Multi-Discipline Account

    A type of investment account that allows access by several specialized investment ...
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