I had the same issue when I did mine. My template had front pages and back pages (all the back had was "This Is Not A Valid Travel Voucher" in light gray text). So I copied the borders from the front, deleted them, and then pasted the borders on the back pages and cut them using the borders from the back. I had to flip the borders and play with them though so that the passes lined up and still kept the shape I wanted it to be from the front. So if I had borders that showed up, it would just be in the back and wasn't a big deal. Also, after I pasted the borders to the back, I made them a lighter color. I made them a very light gray so that it wouldn't be so obvious.
It turned out fine, but was a little tedious making sure it kept it's shape. Hope you find that helpful or find an easier way to do it.