The 'official' one (i think it's official):
http://www.oscommerce.com/community/contri...h,authorize+aim
When my customers use a card that doesn't have their address information available, and I have authorize.net set to reject these cards, my users press confirm and and are presented with a blank screen in place of the checkout success/checkout failure.
The transaction shows in the authorize system as 'declined', but my users frequently hit the back button and try again and again. No order is recorded in the osc database.
This is the code/setting at authorize.net: "Address information for cardholder is unavailable (U)"

