What version of PM are you using? You can either access a checkbox through its checkbox or its label. By default the labels for a checkbox are "true" or "false", but you can redefine them with the list of
options in the properties for the checkbox.
I recommend that you use these conditions in your gateway:
isset(@@SwipeCard_label) and @@SwipeCard_label == "true"
!isset(@@SwipeCard_label) or @@SwipeCard_label == "false"
If you have redefined the labels in your options list as "On" and "Off", then you can use these options:
isset(@@SwipeCard_label) and @@SwipeCard_label == "On"
!isset(@@SwipeCard_label) or @@SwipeCard_label == "Off"
See:
http://wiki.processmaker.com/3.1/Checkb ... x_with_PHP