To Pay a Bill online, all you need is the following:
1.  Amount of Invoice
2.  Credit Card or PayPal account

When you click the Pay Now button above you will see the screens below.  Enter your amount to pay in the “Price per Item” field, then press Continue. You can use your PayPal account to pay or any major credit card.  If you do not have a PayPal account, not to worry,  just select “Pay with Debit or Credit Card” as highlighted in red below

PayPal

PayDebCred