The Buy Units page allows you to add additional Units to your account.

Units are purchased either as a one-off, or as an automatic top up that will recharge your account if it runs low.

Once you have made your selection, clicking 'Buy' will take you to a page showing the draft invoice for the units you are purchasing.

If you are set to pay by credit card, this will either ask you to add a card if you don't have one registered, or ask if you want to use an existing card you have registered.

Depending on the type of credit card being used, it may then ask you to confirm the transaction with your credit card company. Once this is complete you will be returned to the invoice page with the invoice marked as paid.  

If you are paying by invoice it will just ask you to confirm the purchase and then it will generate the invoice.

You can then download the invoice if you require. The units will be immediately added to your account.

Automatic top ups

When you see automatic top ups you will see they have two numbers against them. The first is the amount of units that will be purchased each time, and the second is the limit it will automatically readd the top up. You can cancel an autotop up at any time by coming back to this page.

If an autotop up payment is processed, you will automatically be e-mailed a copy of the invoice for the payment.