My daughter is on her fiance's house title but not on any mortgage. If he files bankruptcy will it affect her financially?

I'm not exactly sure what you mean by "financially" as that is quite broad.  Your daughter is obviously not responsible for her fiance's debts, so his failure to pay them--whether inside or outside of a bankruptcy case--should not affect her.  However, depending on which bankruptcy chapter he filed, the equity in the house, exactly how title is held, and what exemptions are available under applicable state or federal law, the house itself might be at risk. Mark Markus has been practicing exclusively bankruptcy law in California since 1991.  He is a Certified Specialist in Bankruptcy Law by the State Bar of California Board of Legal Specialization,  AV-Rated by martindale.com, and A+ rated by the Better Business Bureau.