How do I set up Coupons that do not discount?

My client wants to issue coupons that do not discount the product price at all but do allow the coupon usage to be tracked.

The idea is that if a certain amount of coupons are used he will pledge an amount to a specific charity.

But if I try to create a coupon it insists on having a positive value.
Is there any way around this?

Regards
Rich

Hi Rich, even if you could enter 0 as the discount, I do not believe it would be registered in the front end. If the discount is 0, the coupon session is not created.

You can certainly do it, but it would require a few hacks, is that what you want? It is probably easier to enter a discount of 0.01.