MBF Leasing LLC is still charging monthly fees claiming that they never recieved their terminal back. Van Nuys, California

Based SOLELY on your side of the matter without knowing if you had past dues or a poor pay record, Its best for you to contact a lawyer. Small Claims court will decide the issue.

You sound smart in retaining your Tracking information of return. Sadly though without it going thru
Description of content or a pack slip ...you may only get half of what was possibly taken on your monthly billings. Our business makes sure that all returns carry the account- the description, insured and a Signor receipt. It has saved us much in the long run as we detest the receiver proclaiming they never got it back.

Start with a certified letter return receipt for request to cease any further charges. Were you under perhaps a year long contract and wanted to cancel early? Nonetheless, you pointed out that they are "threatening to collect" or send to collections. It is a business's right to collect monies due....its your business right to show proof or dispute properly. Again, seek counsel as I do not know all the facts and what their side is.