Massachusetts laws are silent on a lot of safe deposit questions. In your case, MtnHiker, your safe deposit box rental agreement is probably where there ought to be a provision covering non-depositor rentals. I suggest you talk with bank counsel about reviewing the contract and seeing whether there's a way to add language that gives the bank the right to terminate a lease by a nondepositor following a contractual notice period (for argument's sake, let's say you'd have to provide 30 days' notice to empty the box and surrender the keys, following which you'd provide a pro rata refund of any prepaid rent.
_________________________
John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8