This will be some management company, right?

It's an amazing market here with so much incoming growth due to population growth, job growth, and companies moving/developing here!

You'll need to hire a title company to find out. 

A title company?

Be sure to follow all formalities, such as sending via certified mail if required.Transfer Rent Payments: Notify tenants in writing that rent payments should be made to the new property management company moving forward.

You could also use "Doug's LLC and/or assigns" where Doug's LLC is your hypothetical company.As for the assignment contract, you can get one from an attorney for probably less than $1,000, you can also make a friend at a title company, they probably have a template they could give you.  

Quote from @Simon Packman: Quote from @Tanner Pile: @Simon Packman What company do you use? 

Calling on the phone is usually useless as they'll tell you to come in.

I was just scammed/mislead by two sketchy Real Estate Wholesaling companies here in El Paso, Texas.

You will get killed on the C and D properties which are usually the majority of most properties handled by a metro PM company.