Like many, I have a hard time relating (parents married over 60 years, both gone now). I would use the money to hire a good lawyer and find out how she opened lines of credit using his reference...maybe some false signatures out there? For 600k I would definitely have someone with a microscope go over the contracts and put an ad in the paper "Not responsible for any debts other than my own' to get the ball rolling dad's way. As for co-signing, I remember a finance professor from college: 'Always get one, never be one." I would have to help out any way I could, but it makes no sense to sign on to a Titanic that has already hit the iceberg and is sinking fast...and I don't think anybody knows how deep the water is yet!
