Selling Property More Than One Person Name On Deed

[Ken P.]

Hello Everyone, 

I wanted to ask a few questions to get some direction. I'm new to real estate investing I still work my full time job but the reason I'm here is to get some help on a possible deal that kinda fell right in my lap... I have a co worker who lives in a house that he no longer wants he do have a mortgage that's about $1400/month but the down side to this is he and his EX girlfriend names are on the DEED. They are no longer together he have tried to contact her but she will not respond back to him so he have lost all contact with her he's still living in the house paying the monthly payments he wants to sell the property what do you all think could be done?