There are two items related to this:

1) When someone enters either Discount/Referral code on checkout, they get the Warning Message: "You must spend at least $1.00 ..." I think I can McGiver this by changing the text to say "Referral Recorded - Note: The discount amount is valid only for the Hardcopy Book"
2) For the Download eBook item with the Discount/Referral/Coupon code entered: The report shows the sale but does not show the discount coupon ID# for that item. It is obviously not recorded since the coupon is set up as DENY for DOWNLOADS. I would like to somehow see that the person tried to use the code even though the dollar discount was not applied. Is this requirement sounding like a custom job?