Is an insured driver responsible for causing an accident to an uninsured driver?

well i don't know are they? ''causing'' makes me thing you were the 'At Fault' party, so if what you are asking is, the insured driver (you) were negliegent/at fault for the accident, but simply because the injured party was not insured do you still owe for their damage? yes you do, makes no difference if they were insured or not (now, they might have some trouble come up from this), if they were an innocent and you negligentthen you (your company) owe for their damage......some states may have statues that bar an uninsured driver/owner from recovery, so might check (you need to turn in the claim your adjuster will know) but I've never worked a claim in a state that had this (handled claims in around 15-20 different states i'd guess).