Can people still pay cash on board for tickets at unstaffed stations? Not everyone has a credit or debit card, and may not have immediate access to the website or phone to call in a reservation. Plus, what if someone gets last minute news that they need to take a trip right away (loved one passing away, urgent business trip, etc.)? I don't think it's necessary to limit Amtrak's sales in such a way, at least in the vast majority of cases.