A passenger found their Key Card after you issued them an onboard quick trip. If they paid in cash, how should you process their request for a refund?

The correct approach in this scenario is to tap the Key Card, void the quick trip (QT), and refund the passenger in cash. This method aligns with standard procedures for handling fare transactions and refunds when a passenger finds their previously issued Key Card.

By tapping the Key Card, you verify the passenger's balance and ensure that any fare discrepancies are accurately accounted for. Voiding the quick trip is essential as it cancels the initial fare that was mistakenly issued. Refunding them in cash provides immediate resolution to the customer's situation, ensuring they are not penalized for finding their Key Card after paying for a new trip. This process also promotes customer satisfaction by resolving their issue quickly and efficiently, reflecting good customer service practices.

The other choices do not adequately address the passenger's request for a cash refund while ensuring proper fare handling procedures.