But, since you're on a month to month contract, if you want to leave, you just have to give 30 days notice.Then, they (the complainers) will usually find a few maintenance things they want fixed, just to flex their muscles a bit, which we would take care of, and then everybody calms down again.I also never had anyone move over an increase.  

You don't need to flex your muscle or fear that in being flexible the tenants will walk all over you.

I declared the tenancy and property abandoned, posted notice where to get their stuff and kept it for up to 30 or 45 days.Parents got the stuff within a few days and thanked me.

If they cheat on their taxes and don't declare their income, we don't consider it verifiable.  

It was made worse by the fact that since the rent in advance was cash, he hadn't declared it on his taxes. 

They verbally volunteered that they lost their job, ran into financial difficulties, moved out of their apartment and in with family, and ended up declaring bankruptcy.

It's like they have a list of "protected classes" in front of them, and just call up declaring themselves to be one of those. 

Simultaneously, no one is going to declare income and pay taxes on it, if it isn't real, but all sorts of people might make up all sorts of boastful income claims ...if they don't have to pay taxes on it.

I don't have a detailed procedure outside of the de minmus safe harbor declaration.4.

Although that is true and is becoming more common as other states and municipalities pass such regulations, you can still require that the income be DOCUMENTED; so a cash occupation would have to be declaring that income for tax purposes - many will be tax evaders and not report all cash received.