What is 3D Secure?

We want to guarantee you the safest possible payment system on 9flats. For this reason we use for most of our bookings that are paid with credit cards and debit cards the 3D Secure-Procedure. This is an authentication procedure which ensures that you are the rightful cardholder. Visa calls this security procedure "Verified by Visa" and MasterCard refers to it as "MasterCard Secure Code".
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