As Brittany says below, your library card does expire. The policy was recently changed from expiration being once a year to once every three years. If your card has expired then 3 years after the expiration date, your account is completely removed from the system. If that has happened, all you have to do is come in and fill out a small sheet of paper (about a quarter sheet) and you can get a new card!
Your library card membership? It needs to be renewed every few years. They can reactivate it if you go in.
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