Is There a Time Limit to Bill for Services Rendered

[luckysevn]

My question involves a consumer law issue in the State of: New Jersey

My former landscaper is attempting to bill for services provided in 8/09, 9/09, 10/09 and 11/09. I have retained every invoice I've received from him (from 2007-2009) and can prove payment via cancelled check for each invoice in question EXCEPT for 11/09.

I have contacted him via letter and explained that I have proof of payment for the dates in question, and have provided him with the check #'s for each invoice #. He has recently sent the bill to collection and has sent me a handwritten letter stating, "how could you possibly pay Nov. '09 when I didn't bill," meaning that he did not send us a bill for 11/09 (which I have to assume is why I don't have proof of payment or the copy of an invoice for 11/09).

My question is: How long does he have to bill us for services rendered? I have proof of payment for every bill/invoice EXCEPT 11/09, which he has admitted he did not bill for. Considering it has been well over six months, I can't recall whether or not he provided service that month or not. He was unreliable and had poor billing practices to begin with, which is why I chose not to renew a contract with him.

Any advice and/or words of wisdom are welcomed!
Thanks in advance!

[jk]

I believe he has 6 years to bill you.