No money left the bank, but the "inputting error" came amid CEO Jane Fraser's efforts to convince regulators she's fixing the bank's controls.

An employee caught the mistake quickly, but the bank has recently made other errors that have drawn scrutiny and fines from regulators.

Citigroup Inc. erroneously credited $81 trillion to a customer’s account instead of $280 last April before reversing the transaction hours later, according to the Financial Times. The bank called it a "near miss.

The bank temporarily credited a customer’s account with trillions of dollars, adding to scrutiny of risk management systems after a series of errors.

Citigroup accidentally moved to transfer $81 trillion to a customer. Yes, trillion. A bank employee mistakenly entered the absurdly high figure last year while trying to manually input a transfer to a client’s escrow account,