Invalid country code provided: The country code entered does not follow the ISO 3166 standard required for bank account processing.
Unsupported country for transactions: The payment gateway or bank does not support processing transactions from the specified country.
Incorrect parameter usage: The country code parameter in the API or payment form was incorrectly named or formatted.
Spelling or formatting errors: Typographical mistakes or incorrect case formatting caused the system to reject the country code.
Verify and enter the correct ISO 3166-compliant country code for the bank account.
Confirm that the specified country is supported by the payment gateway for transactions.
Review API or payment form configurations to ensure the country code parameter is correctly implemented.
Retry the transaction only after correcting the country code.
Contact the payment gateway support team if the issue persists despite providing a valid country code.