PS5
All locations (I assume - I observed this in Freelancer/Dubai)
While hiding in a closet/bin and holding a briefcase, if you go into your inventory and equip an item that 47 holds with both hands (ie the Golden Sawed-Off Bartoli 12G) this will cause the usual action of 47 to drop the briefcase. However he drops it INSIDE the closet/bin making it impossible to pick it up again.