NJ is my state of residence. I live in a 2 family house. Tenants occupy the 2nd floor and I live on the 1st floor. When they moved into the apartment in 2005, they signed a lease for one year. After the 1st year, it became (and still is) a month-to-month tenancy. One of the terms of the lease stated a $50 late charge would be added to the rent if they paid the rent after the 5th of the month. When I asked for the rent yesterday, they told me they didn't have it and wouldn't have it until sometime this week. I then informed them that they will have to pay a $50.00 late charge. They told me since the signed lease expired in 2006, that no longer applied. I was told by a real estate agent that even though they didn't sign a lease for their month-to-month tenancy, they still have to abide by the terms of the lease they signed. What is true? Are they still legally bound by the terms of that lease or not? Am I entitled to the late charge or not? Thank you.