Originally Posted by
Nikongirl
Even if you don't have a boarding pass for the return flight, you still don't need to leave the secure area. Just go to the gate or Customer Service Center, show your reservation info, and they will print one for you.
Welcome to the world of MRs!
+1
Also don't worry about telling the crew, or showing them your stack of ticket stubs - I found they are quite amused by it.