I haven't wholesaled here in a while but it shouldn't be illegal to assign contracts.It is illegal  / unlawful to broker something you don't own without a license. 

You taking possession under that court order is invalid, unlawful, and is trespass.

This means that clause must be worded only to include unlawful possession and I certainly will not allow that on my properties.

@James Wise I'm not going to comment on right or wrong, since that has very little bearing on what a state regulator will consider lawful or unlawful according to their own contrived interpretations. 

If the squatter returns and breaks in again now, the police have grounds to arrest them for unlawful entry.

If they don't move out, you then go to court and file for unlawful detainer to evict them.

“Drug-related illegal activity” means the illegal manufacture, sale, distribution, purchase, USE, or possession with intent to manufacture, sell distribute, or USE of a controlled substance (as defined in Section 102 or the Controlled Substance Act (21 U.S.C. 8002) or possession of drug paraphernalia.2.Resident, any member of the resident’s household or guest or other person under the resident’s control shall not engage in any act intended to facilitate illegal activity, including drug-related illegal activity, on or near the said premises.3.Resident or members of the household will not permit the dwelling to be used for, or to facilitate illegal activity, including drug-related illegal activity, regardless of whether the individual engaging in such activity is a member of the household.4.Resident or members of the household will not engage in the manufacture, sale or distribution of illegal drugs at any locations, whether on or near the dwelling unit premises, or otherwise.5.Resident, any members of the resident’s household, or a guest or other person under the resident’s control shall not engage in acts of violence, or threats of violence, including but not limited to the unlawful discharge of firearms, prostitution, criminal street gang activity, intimidation, or any other breach of the housing agreement that the other wise jeopardizes the health safety or welfare of the landlord, his agents, or tenants.6.VIOLATION OF THE ABOVE PROVISIONS SHALL BE A MATERIAL VIOLATION OF THE HOUSING AGREEMENT AND GOOD CAUSE FOR TEMINATION OF TENANCY.

The unlawful detainer? 

The only person with whom I had contact with the authority to communicate or negotiate anything on the landlord’s behalf was their locally retained law firm, after an unlawful detainer and collection action was filed.

@Brittney CainIf they have done anything unlawful, yes, in MI.