We can process online credit card payments with the PayPal system without users to register PayPal account. You just specify your card credentials in an authorized system.
1- Open Invoice
Once you receive the invoice e-mail you can view the invoice and process payment.
The amounts due, descriptions and pay-online button are specified in the invoice details.
2- Choose appropriate payment method
In case you have registered PayPal account you can manage payment directly from PayPal system, otherwise you can select payment via Debit or Credit Card option.
3- Continue and confirm the payment
Once you fill all required information and complete authorization successfully you will get the online payment confirmation.