We took in a friend in need 7 months. Ago with no request for rent. Once employed(4mos. Later) he insisted I come up with a figure to charge him. I declined ,but he was adamant so I told him to give me what my daughter gave me as her contribution to the house,$40.00 a week. We had no "lease' . he gave me a check for$160.00and called it rent for May. we had a falling out shortly after that and he began staying at another daughters house, only coming by in the wee hours of the morning when we were all asleep, to get clothes or whatever. i only found out he had been there by a friend seeing him leave early a few times. this seemed creepy to me,so i waited for him early one morning (he'd been at our daughter's 2 mos. already)and told him i didn't want him sneaking around while we slept and to get his stuff out.by the way he also left another check on my table for June. this was now July and i needed the space he'd been using for my parents impending visit. he refused to take his things so i gathered them up and put them on our enclosed porch. now he wants to sue us for"illegal eviction". Does he have grounds?

He didn't sleep/live at your house in July.
Pay anything for July
You PACKED his clothes and
Never officially or unofficially told him he was kicked out
Right?
So he is one of those type people that THINKS they know the law and want to use their lack of knowledge to get over on people.
Let him spend the money to take you to court and tell the Judge he left on his own and all you did was pack his stuff up to make it convenient for when he came by to get it.
Don't change the locks yet or he could use that as proof.

As far as him using the fact you told him not to come in the house in the wee hours of the morning I don't think that will hold too much weight. Who wants anybody going in and out in the middle of the night.