According to the Euregio website, you can purchase the ticket both at a counter at the Maastricht train station, from a ticket machine and from some bus drivers (not all). avv.de/web/hauptdrei/euregio... An alternative and cheaper way that you might consider if you want to travel in the Dutch area of the Euregio ticket is to purchase a day card for the Veolia buses (including the ones to Germany). It costs only 4 euro and is sold in the bus. Best, Venelin
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