We actually want to move two people...switch one from each of two cabins into the other cabin. Giving those two access to the other cabin would solve part of the problem. We will all be using the same credit card for onboard charges, but one of those who is switching cabins will need to pay us back (she has no credit card of her own). Unless her medallion can be changed to show that she is in the new cabin, we can't figure out how to differentiate her charges as each time she charges something it will show up from the wrong cabin, along with the charges of those occupying that cabin. I know this is as clear as mud, but we have some smart and well traveled posters on this board. So we're hoping for wisdom...perhaps from someone who has done it. We sailed Princess before the medallion was put into use (we are platinum on Princess). And with all the other lines we have sailed this would be an easy fix as we've done it before. But it seems like the medallion may gum up the works. Ideas anyone?? Thanks!