Interesting to see Mitscaype's review because the exact same thing happened to me! Made a booking with my usual card, received confirmation and was then told the card was invalid. The card isn't invalid and I have used it since, I am a regular traveller. So I called the hotel and a very nice man said the card didn't work and now my boss tells me we are full. So no chance to 'correct' the 'problem', promised to call me back but never did. So I challenged this and placed another card on the booking. Then 7 hours later received a message from the card provider asking if I approved a payment to the hotel to which I answered YES. Immediately called the hotel and another nice man said sorry but we are full and your cards are not working. Please try again I requested, 'no point, we are full'. 'But what about my booking?' Anyway to cut a long story short, Paris prices were sky high, double what I had paid, so I understand why they didn't want to provide me with a room. But it's a bad game, played by people who do not care for their customers. For sure overbooking mistakes happen but don't blame the customer and their perfectly working card - we're not stupid. So I would be careful booking with these people as you may not have a booking when you really need it and they probably won't bother to tell you either.
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