If your Amtrak ticket doesn't have a seat number, don't worry! It usually means you're traveling on a train with open seating, like many regional and commuter routes. Just find any available seat when you board. If you're unsure or need help, ask a conductor for assistance. For specific trains like Acela, you might need to visit a ticket agent or check the Amtrak app for seat assignme... https://reservationsus.com/what-documents-are-required-for-a-train-reservation/