Just deed the property back to whoever the assigns is and walk. There is no foreclosure so there can be no deficit. Make sure you take lots of pictures of the property with witnesses when you leave, and call the local cops and inform them it is vacant.
You should NOT be giving legal adive!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
This is remarkably bad advice. You clearly are not a lawyer and do not have a clue.