Sorry my last post was slightly off, here is the updated info. Thanks to Jay Hinrichs
you can do sub too on any property.. with any lender.. and any lender private or not has an alienation clause in their debt instrument so they can call the loan if its alienated.
Title company is irrelevant other than faciliting the transaction. And you don't need a title company for Sub too.. I have done hundreds of them and did them all myself.
However in practice lender calling the loans it rarely happens as long as you keep the payments current.
Now I am not a FAN of sub too for most Sellers I think they take huge risks because most buyers of sub too don't really have the wherewithal to cure if the bank calls the loan.
So if you have as a seller deeded your property away and the buyer walks your screwed you don't own it any more so you can't refinance and you have to do a foreclosure to get it back which costs thousands. I know for limited capital investors or limited credit investors its a tool they like.. but its really bad for a seller unless the sellers' credit is already trashed and their is no equity and they were walking anyway.. and its a purchase money 1st were no deficiency judgment could be obtained by the lender