One-way tickets may be purchased on board MARC Trains with cash only; no debit or credit cards or checks are accepted. Tickets purchased on trains are subject to a $5.00 surcharge if the ticket vending machine was available and/or the ticket office was open at train departure time. The $5.00 surcharge applies to all passengers except senior and disability fares. Conductors cannot accept any bill denominations above $20 for cash purchases on trains. Passengers presenting bills larger than $20 will be asked to leave the train at the next station with a TVM or a ticket office to purchase their ticket. All ticket sales on board the train are final and are non-refundable.