Players must ensure that double-faced cards in hidden zones are indistinguishable from other cards in the same zone
For high-value cards, consider grading and encasing them with PSA or other professional card grading services
The fact that they become upset at how they are treated is a problem for another article, Im sure, but the simple answer is that the blame is twofold
The whole card has a glossy finish
It's going to be interesting to see how the latest set, Sword & Shield Astral Radiance, is seen because it has a special Trainer Gallery subset consisting of Character Cards, Character Super Rares, Full Art Trainers, and Black and Gold VMAXes that can be pulled in the Reverse Holo slot along with the new card type Radiant Pokmon
What do you think of the new, corrected Pokmon card back design