Hello,

You can create a coupon with a reduction of 0.0001 (if you enter 0 the coupon will not be displayed).

But this is not a really good solution because on the invoice the customer read :

coupon : CODE_COUPON -0.00

And I'd like to see :

Coupon : CODE_COUPON (COUPON DESC) -0.00

So that you can explain in coupon description that you are offering a gift for free.

Can someone suggest the code to display "coupon description" on the invoice.

Moreover, the best solution will be to :
- add a line in the cart with the article
- redeem the total with the price of the item
- So decrease stock of this item

A future mod for anybody with good development skills