When posting charges or payments to the Attached Lock-off reservation, the PMS will instead post the charges or payments to the Master Lock-off reservation by default.
In the below example, Room 1003 is the Attached room in the Lock-off (Room 1004 is the Master). Note what happens Post Charges is clicked:
When attempting to post a charge to room 1003, the PMS will switch to the Master room (1004). Note the Res ID for 1004 is 2831. All charges will automatically post the Master room.
NOTE: Even though Room Charges may post to the Attached room throughout the stay, upon check-out, all Room Charges from the Attached room will also transfer to the Master room, keeping everything on one final invoice.