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Your personal identification number (PIN) is a four-digit number, either selected by you or a default number assigned by the Library.
If you don't recall selecting a PIN when you requested your card, then most likely, a default PIN was assigned by the Library. The default PIN is constructed by combining the last two digits of your birth year with the last two digits of your phone number.
You should not share your PIN with anyone. You may change your PIN by presenting current identification at any St. Louis Public Library branch.
Together, your Library card number and PIN will allow you to:
and much more.