What kinds of situations would require the FDIC to refund or replace the money it protects?

The FDIC (Federal Deposit Insurance Corporation) would need to refund or replace money in situations where a bank fails, and insured depositors lose access to their funds. This typically occurs when a bank becomes insolvent, leading to a closure and subsequent payout of insured deposits up to the limit of $250,000 per depositor, per insured bank. Additionally, the FDIC may intervene in cases of fraud or theft involving insured deposits, ensuring that affected depositors receive compensation within the insured limits.