My friend rents her basement out. The tenant lost her job early this year and put my friend and an awful, comprising situation for 3 months. My friend gave her a chance and worked out payment plans etc. When you think things are finally going well and sort of caught up; it’s starting all over again. The tenant is falling behind her rent and this time she (my friend) can't afford to fall behind again on her mortgage, bills, sitter etc. She's a single mom, so it’s really hard. So, my question is being this is an illegal apartment, what are the measures in evicting her? This time she has no choice, the tenant needs to go. Do you know how to go about this?? This is in Suffolk County (Islip)

Please advice! Thank you in advance.