The request for this credit card is made to guarantee payment in case you are the winning bidder of the auction. It is done using the secure system provided by the STRIPE online payment infrastructure ( https://stripe.com/), and they are the custodians of your data. Hogeitabi SL neither accesses nor retains any of your credit card details. If you are the winning bidder, 10% of the highest bid amount will be immediately charged to your card, while waiting for the remaining 90% to be transferred via bank transfer, which you will be informed about if applicable.