In some cases, when the reservation is made on condition of payment upon arrival, I ask all my first time clients to provide credit card details to guarantee the booking. When the booking is completed, credit card details are transferred to my website to serve as the guarantee of the client’s intention. The data is transferred in an encrypted state. My website may check if the limit of your credit card is sufficient to cover at least the minimum price of my service and block a certain amount of money. As a rule, the blocked amount is equal to the price of one single appointment. In rare cases, my site may charge the full cost of an appointment.