License Each license is valid for use on one domain or sub-domain. This means you need to purchase separate plugin license for each Oxwall software installation. You are of course welcome to create a private copy for development purposes. Payment Our credit card payment method is highly secure as we do not keep any information related to the payment in our hands. The whole credit card transaction is processed by 2CO (www.2checkout.com), a well known and secure credit card processing agent. As we are not involved in the credit card processing, you are directed to the 2CO’s own payment processing page.