If possible, please avoid buying OBB train tickets. If you must buy them, be extremely cautious and vigilant because their tickets are not cheap and there are many traps and unreasonable regulations. Even if you pay extra to retain the right to make changes and cancellations, in the end, you still cannot make any modifications or cancellations. Their customer service only responds with canned messages and refuses any requests. It's really a terrible railway company, perhaps because it is state-owned, they can do whatever they want.
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The Austrian Federal Railways is the national railway system of Austria, and the administrator of Liechtenstein's railways.