1Log in to your NOCHEX account
2Click on the 'Edit Automatic Payment Confirmation Details' link

You should now be presented with a screen containing the following:

If the 'Edit Automatic Payment Confirmation Details' link is not present you will need to contact NOCHEX support and request that your account have this feature activated.
Enter the following URL in the input box:

Click [Save Changes]
3Go to Paid Subscriptions > Payment API Manager > NOCHEX in your vBulletin AdminCP where you will be presented with the following screen:

and enter your NOCHEX email address in the NOCHEX email field.
4Finally, change the active setting to Yes to activate payments via NOCHEX in vBulletin
NOCHEX does NOT support recurring payments.
User Contributed Notes: NOCHEX