The insurance industry has access to an index for claims based on a social security number. It can show some things like personal injury and work comp claims. Also, in California, the public has access to EAMS, which shows some public records information on workers comp cases filed with the workers comp courts (WCAB). You can check it here: https://eams.dwc.ca.gov/WebEnhancement/
Legal Proceedings such as a WC claim wil show up if someone takes the time to obtain Background Investigation.
Attorneys are very competitive. Choose the Best Answer so we know who helped you the most.
you don't mention what type of background check. If you mean for employment, yes, they could find it but it's unlikely they would go that far. If you mean an FBI background check...count on it. Workers' comp. cases are public records it just depends on how much trouble someone wants to go to to check.