I went through Trip Advisor - can't believe they send you to this site - booked a hotel - gave them my credit card.
Then they send me an email saying that they want to confirm my credit card by doing a small charge. Then they ask me to confirm the small charge. Ok I do it. Then, immediately they send through the large charge.
Every bank's fraud detection software looks for small charges followed by large charges - that's how people who steal credit card numbers verify the card is good.
Of course my bank declined the large charge then notified me. Within hours this site cancelled my reservation at a fully booked property and I am left with little options.
I can't believe these morons are still in business and am now looking poorly at Trip Advisor for directing me there.