Some credit card institutes require 3-D Secure authentification to process online transactions. As a result of this requirement, you might receive the following warning after selecting "credit card" as a payment method and depositing further details:

"Your card must be authenticated with 3-D secure before continuing."

In order to subsequently set up 3-D secure payment for your preferred credit card, please refer to the articles below.
Please be aware that by clicking on these links you will be forwarded from the Yumpu page to the website of the respective credit card institute.
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