Are the contents of safe deposit boxes insured by the FDIC?
No. Financial institutions pay assessments to the FDIC (or to the NCUA, in the case of credit unions) in order to have insurance on deposits. That deposit insurance covers only funds that are in actual deposit accounts or Certificates of Deposit with the bank (and a few other things, such as outstanding cashier's checks, etc., that aren't really relevant here.) Property that is inside a safe deposit box rented by a customer is not "on deposit" and even if some of the property in the box consists of cash, it is not covered by deposit insurance.
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