Below is an example skypay form. This example is for a simple online invoice paying system. The page assumes that someone has logged in and will pay an invoice that is outstanding.

In order to test the system, use the credit card details below, and the amount you enter will give you varying results to test the system:

Test Visa Card Number 4543 0599 9999 9982, Expires 12/10
Card Verification Value 110

Order Value less than £50 will be accepted
Order Value between £50 and £99.99 will be REFERRED
Order Value over £100 will be CARD DECLINED

You can then log into skypay with a username of "demo" and a password of "demo" and see the system working.

The live system has various methods that you can employ from your shopping cart / secure payment screen which eliminate a customer fraudulently altering Order Details or Amount details. skypay also has a settings file where you can prepare the details for the success and failure pages and the security settings so that they do not get passed in as hidden parameters on the form. Also, if you are using a scripting language such as PHP or ASP you can submit your form to your own handler whichthen talks to the skypay authorisation routine so that anyone being inquisitive and looking at the code of your form cannot see anything that they can change.