Replying to Avatar Pablo Xannybar

It's no surprise you can buy a generic writable NFC card but it's a pretty cool "hack" that you can turn a hotel card into one because they don't lock the permissions down - presumably because it makes it easier to write different rooms to each card.
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9fe72c76... 2y ago

I am not super knowledgeable about NFC cards but, do you think the cards are somewhat rewritable? Or a hotel clerk needs to register specific nfc cards as keys for a specific room when checking in?

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Pablo Xannybar 2y ago

It'll depend on the hotel, but if you can rewrite it from your phone it's definitely rewritable. Hotels don't tend to have top end tech teams.