I'm not a lawyer yet, but from the little research I did the answer is: it depends. Relevant links: http://www.nossaman.com/catching-waiver http://www.nossaman

I'm not a lawyer yet, but from the little research I did the answer is: it depends. Relevant links: http://www.nossaman.com/catching-waiver http://www.nossaman.com/catching-waiver http://michaelreiterlaw.wordpress.com/2011/07/29/waiver-of-california-civil-code-section-1542-and-unknown-claims-in-personal-injury-litigation/ http://michaelreiterlaw.wordpress.com/2011/07/29/waiver-of-c... Hopefully that helps.