The short answer is YES - but you can't hold the stuff as ransom for other money owed. And it's 33 days - not 30 - allows for mailing. Below is a "pasted" body of a letter an attorney gave me/ Good luck...............
Dear -------:
You are receiving this notice because you abandoned personal property on the premises at ----- Street, Apartment #1, -----, New Jersey 078---
You have 33 days from today to collect this property, or it will be sold or discarded. A tenant is entitled to the return of his or her abandoned personal property after move out, even if rent is owed.
The law now requires you to pay reasonable storage costs as well as costs incurred to transport said property to a storage facility. You may call to find out the current balance on storage and transportation fees which must be paid in advance of retrieving your abandoned personal property. Only cash, money order, or certified bank funds made payable to your landlord will be acceptable.
Please come prepared to cart your property. Bring help and/or boxes and suitable transportation. If you do not completely clear out all your belongings, additional storage fees will apply. Any perishable food left behind was discarded.
Your security deposit and any other monies you owe are separate matters from the retrieval of your personal property, but you must still pay the storage and transportation fees in advance.
This letter was sent to you by certified mail, receipt # 7014 ----------- and also by conventional mail.
Very truly yours,
landlord name
--71.251.xx.xxx