I get an error message saying - 'Your card does not support this type of purchase' while making the payment. What should I do?

Some cards have restrictions on cross-border usage. If the card was issued in a country other than where the business is located, i.e., if you try to use a domestic card for international transactions you might get this error message.
In that case, contact your bank to see if they have imposed restrictions on international transactions.
To know more about Billing in Vtiger, click here.