An ATM currency cassette includes a currency-low indicator mechanism. The indicator mechanism can be held in a locked position during cassette handling and transport. The indicator mechanism can be automatically locked during removal of the cassette from an ATM; automatically unlocked during opening of the cassette lid; automatically locked during closing of the cassette lid; and automatically unlocked during insertion of the cassette into an ATM. With the lid open, the cassette can be replenished with currency. The locking and unlocking can be controlled by both a cassette tambour door and the cassette lid. The locking arrangement can reduce service calls due to the currency-low indicator mechanism tripping prematurely.