Hey, if we get cards and upon arrival some of them seem to be fake, what is the protocol? I strongly suspect one of them and while i plan to have a Long time store owner inspect them, I feel its reasonable to delay shipping my side of the trade. I hate to hold my cards intentionally but one of the tropical islands seems very very odd compared to the other. It passes the light test but it just looks so wrong. any advice?

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I suggest taking it to your LGS and have them inspect it as soon as possible. If you still suspect that the card may be fake, you should inform your trade partner and ask how he'd like to proceed. You may undo the trade and have both parties send all their cards back or send back the one Tropical Island and the appropriate counterpart.