There may be several reasons why this is happening, but if you’re sure that your credit card is working and that you’ve entered the correct information, then it could be one of the following reasons:
Our credit card payment handler has a sophisticated fraud detection system. It makes sure that stolen credit cards cannot be used but sometimes we hear reports of “false positives”. This might happen if you’re trying to upgrade your account from a different country than the one registered with your credit card. In these cases we recommend that you try a different payment method. If none of the options work, please contact us for alternative solutions.
PayPal Issues for German Customers
PayPal has reported that recurring payment profiles cannot be created for German customers. If you're a client from Germany, credit card payments are the only option.
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