Hello,
We apologize for the issue you are facing while trying to order Rank Math SEO Pro. The error message you are encountering can be frustrating, and we appreciate you bringing this to our attention.
Here are some troubleshooting steps you can try to resolve the payment issue:
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Select Your Current Location: Ensure that the country displayed in the dropdown menu at the top-right corner of the checkout page is correct. If it shows a different country, please select the correct one.

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Turn Off Your VPN or Proxy: If you have a VPN or proxy server enabled, please turn it off, as this can interfere with the payment process.

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Ensure Your Card Supports International Payments: Make sure your credit or debit card supports subscription payments and international transactions in US dollars ($).
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Contact Your Bank: If the issue persists, it may be helpful to contact your bank to understand why your payment is being blocked and ask them to approve it from their end.
Unfortunately, we cannot provide a PayPal account or bank account details for direct payments. If you continue to experience issues after trying these steps, please reply to this ticket, and a human agent from our support team will assist you further.
Thank you for your understanding, and we hope to resolve this issue for you soon!
Sources:
Troubleshooting Payment Issues at Rank Math » Rank Math
Hello,
Could you please confirm which country are you in when purchasing Rank Math?
Also, please share the last 4 digits of your card and the first & last name you have used so we can check.
You can add them to the sensitive data section by editing your first post

It is completely secure, and only our support staff has access to that section.
Looking forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.