Depends how professional the current PMC will be about the transistion.First, have client get all leases.Then rent ledgers.Make sure you get a copy of their current management contract, so you understand the Termination requirements - you don't want to break any state agency laws and have the curent PMC file anything against you.Make sure the client follows the Termination requirements BEFORE you take over.Suggest the owner emails their Termination notice to current PMC and copies you on the email.

In fact I have a clause in my leases that if I find out anyone is doing so it will immediately terminate their right to remain in the lease and they will be served notice. 

You can't experience your projected appreciation if you can't keep the property over the hold period.For investors who already have the terminal porfolio they want, cashflow is how they monetize that portfolio and keep compounding at increasingly lower risk (but also lower returns on equity).

I submitted 60 days notice to terminate my contract with them in mid December so mid February would end the property management agreement.

If the bank finds out, they can terminate the mortgage.

When the lease is signed both parties agree that at the end of the lease either party can terminate the lease for whatever reason or no reason.  

Quickly develop a plan for offering early termination.

You can give them a 30-day notice of termination.

Best to prepare before doing so, so that you can meet with (or terminate) your existing PM, view your rehab, and meet with the new PM(s) and contractor(s) before finalizing things and heading back out. 

I also file a 30 day notice if they don't commit to renewing their lease between 30 and 60 days from the lease's termination date.