I live in Ca. I have a claim against a government agency that charged for metered water in error. They admit the error and have reimbursed for the past 3 years, claiming they do not need to return what they collected prior to 3 years because that exceeds the 3 year statute of limitations as defined in Cal code of civil procedure section 338(d). Our claim dates from 4/2001 thru 3/2011. We identified the error in 4/2011 and asked for reimbursement. They credited our account for what they claim is the errors in billing for the past 3 years and claim they do not have to return the errors in billing for years 2001 - 2008 because that is excluded by statute of limitations. My interpretation is that I have 3 years to bring action starting at the time of discovery (4/2011). I do not understand their claim that their responsibility does not extend beyond 3 years prior to discovery. Can someone please help me understand what STATUTE OF LIMITATIONS means in this case.