What, if any, are the exceptions to an employee’s right to inspect their personnel records?

In California, an employee must be permitted to inspect the file after giving reasonable r notice, during their own time, and generally no more than once per year. An employer may refuse to let the employee inspect the investigation of a possible criminal offence or letters of reference. They are entitled to a copy of anything they have signed. Copies of payroll records are an exception. Employees must beprovided copies withi n 21 days.