The gift certificate section of the receipt can be "controlled" by setting the Receipt Options. To get to the Receipt Options form, do the following:
1) Select Tools / Options from the main menu.
2) Select the Receipt Status tab.
3) Click the "Type Style Receipt - Advanced Options" button.
Alternatively, you can check out RetailEdge 8.0. This release has more receipt options. More importantly, 8.0 introduces the concept of Gift Cards and has a Loyalty Program. To learn more about RetailEdge 8.0, please check out the following link:
http://www.retailedge.com/point_of_sale_software_general.php