Again someone who discovered what is so clearly written in the country info. You do not have to wait til that day on that station-pop into any german station with a ´Reisecenter´ and have it done-there are sllightly higher prices for going over the border. OR-this will lengthen the trip, if you cannot stand the uncertainty-plan with local trains over border till Rzepin or go via Kosztrzyn (Bus replacement over the bridge=river=border). Note that In PL all longer distance trains from PKP (named IC or TLK) also have mandatory REServ-this is free when done at a PL station. Also note that in some areas the pass is NOT accepted on some local railways, like this Mazowieckie. The S-bahn trains Gdansk-Gdynia are run as SKM and from PR and included, but do not waste passdays for short trips.

Just by chance tomorrow I fly to PL-but even now that I have a pass, will not use it as its Koleje Mazowieckie to take.