Bank Box

Every Character has a Bank Box, accessible from any zone that has a House Maid or a Banker. Simply talk to the NPC and, if asked, choose "I want to open my bank box".
Everyone has 2 Bank Boxes (Box 1 & Gifts) open and usable for free, but Bank Boxes 2, 3, 4, and 5 must be leased to be accessed (even if not currently leased to be accessible, the boxes still exist with whatever you have put in them held securely).