Note: The availability and features of the app might differ from country to country. Kindly check with the app to see what's available in your region.
This might happen for a number of reasons:
card is not issued by Visa or Mastercard
bank is blocking the transaction
card is not fit for international transactions
card details were entered incorrectly
card was previously added to another account
Contact your bank for details if you think the issue is on their side. Our support team will also be happy to help you. You can reach them any way you like:
in-app chat (the "Chat" tab in the bottom navigation bar)
in-app contact form ("Menu" → "Contact us via email")