VDC is used if you want to bill the clients yourself and then you pay the wholesale cost.

If you have never used VDC before you may wish to change the VDC pin to make it more secure. In your admin panel click visp then edit. You will see the current vdc pin code. Just type in what you wish it to be and click update.

Then when placing orders click pay by VDC, at the end of the order process you will need to put in your VDC pin.