Incorrect. By law, at least, cash is mandated. Not a voucher. Relevant text: >Except as provided below, the airline must give each passenger who qualified for

Incorrect. By law, at least, cash is mandated. Not a voucher. Relevant text: >Except as provided below, the airline must give each passenger who qualified for involuntary denied boarding compensation a payment by cash or check for the amount specified above... The air carrier may offer free or discounted transportation in place of the cash payment.... The passenger may insist on the cash/check payment... Full text: >Except as provided below, the airline must give each passenger who qualified for involuntary denied boarding compensation a payment by cash or check for the amount specified above, on the day and at the place the involuntary denied boarding occurs. If the airline arranges alternate transportation for the passenger's convenience that departs before the payment can be made, the payment shall be sent to the passenger within 24 hours. The air carrier may offer free or discounted transportation in place of the cash payment. In that event, the carrier must disclose all material restrictions on the use of the free or discounted transportation before the passenger decides whether to accept the transportation in lieu of a cash or check payment. The passenger may insist on the cash/check payment or refuse all compensation and bring private legal action.