Using Ship it would be very helpful if the labels we create stay valid slightly longer – maybe 2 weeks as we like to be able to include return labels with what we are shipping so it can be returned to our office at the conclusion of an event. We ship a bunch of event materials in a tote and then the tote is shipped backed to us after the event with supplies and anything else that was unused. Luckily I caught the return label was cancelled before our event ended so I can email them a new label to print.