It's important to educate yourself on how to prevent it from happening, and then being prepared to act quickly and decisively if it does happen.The problem is pervasive enough in Cleveland that a Google search turned up a lot of news articles, helpful blogs, and other resources.

Some dirty units and stained sheets.

OR by violating any laws and illegally preventing them from moving in. 

I recommend spending some time educating yourself on how to analyze properties to prevent you from making the same mistake again.

It was stained and old, but the reason I am replacing it is because it got wet and has some mold.  

Tell the original seller so he can be there with a copy of the deed to prevent the placement of the mobile home?

She will learn street fighting and survival techniques as well as how to fight multiple attackers and prevent rape.

A title report would be necessary to confirm whether or not there is anything preventing a current sale by the owner of record.

This is to prevent someone from piercing the veil to ultimately bypass the LLC and sue you personally.

Lots of opportunities to stop and prevent it.