You may have in mind that a court cannot hear evidence of insurance .That means that, In a civil action, the judge is not supposed to be told that one side or the other is insured .Of course, he or she may guess that it's highly likely that a party is insured by some insurance company, though not all the terms of that insurance, but, nonetheless, the judge is not to know while the case is being tried. The reasons are a) that whether a party is insured or not has no relevance to whether and to what extent they are liable for the action,or inaction, complained of and b) the knowledge might bias the judge to find against the insured party