You can purchase things like membership, event tickets or merchandise online with a valid credit card. Choose what you want to buy by clicking on it, then click the shopping cart icon in the top menu to start the checkout process. You will need to include your full address including a region (equivalent to a State in the US). Your information will already be pre-populated if you have created an account.
On the last page enter your credit card details. We will not see these details because, at that point in time, you are on the Payment Gateways Secure Site.
Please note: if you have previously created an invoice and want to now pay, navigate to your Transaction tab and next to the Pending Invoice click on Make Payment. This will take you through the checkout process.