It seems to be a common problem misplacing your departure cards. As my daughter had a very nasty experience over this we found out that the most they can charge you is RP10,000 so don't let them bully you by trying to get $A50 each. Maybe the complaint we made must have changed their attitude as others have put on the forum that they didn't have the same problem. Some times it pays to be up front. If they are nice to you give them a tip.