NEVER ever co-sign on a loan. Almost Rule #1 for finances. If you want to make a CASH contribution that is one thing, but never ever lend your credit. Many many good people have been ruined financially by doing this. I' helping one right now. You are 100% responsible if something goes wrong, she gets married, divorced, job transfers, layoffs, move for the heck of it, spouse doesn't pay their taxes, and so many other situations you can't believe, most of which are out of your control. Love in this case is saying NO. If your daughter has bad credit, that means she has had trouble paying bills in the past. Love is showing her how to be responsible and paying on time, and the rewards (like home ownership) that go with being responsible. Hang in there.