Purchased the personalized mayan alphabet pendant on the bus tour to Chichen-Itza and paid by credit card at the lunch stop. Within hours the card was being used at several gas stations throughout Mexico and also at a variety of other vendors. This is the first place the card was used in Mexico then not used again for four days so there is no where else it could have been copied. I have advised Palace Resorts as they are an approved vendor (or so the bus tour lady told us) for PR and also Air Canada Vacations who we booked our travel through. I have travelled extensively throughout the world both on business and pleasure and have never had this happen before. So beware - take cash!