At this time, Gift Certificates are managed solely via the purchase/order method ... as they are considered Cash and Cash does not get lost ... only stolen ... :eek:
The only other option is to delete a Gift Certificate in the queue prior to releasing it ... but again that would have to be manual ...
What can be done is if the GV has been claimed then used at the physical store, is reduce the customers GV balance manually ... but again there is no tracking for this ...
You would be better off making a product for In Store GVs ... and have the customer login and checkout with XX amount or you do it for them ...
We will be adding on to the Gift Certificates and Discount Coupons in future releases to add many more features and flexibilites with tracking for cancellations, reductions, increases, etc.
If this is something that you really need done yesterday, you might wish to either post in the Commerical Help wanted for help, or contact someone on the Zen Cart Team to customize this code properly for you ... :cool: