Where would you get a form to file a complaint against an auto insurance company?

Your state should have a division or department of insurance. You can find them in the blue pages of the phone book, or do a google search via the web for your state. If the complaint is against your own carrier, the division of insurance can probably help you. If you're making a complaint against another person's insurance carrier, don't hold your breath for results. The division of insurance in your state probably can't influence liability decisions, nor can they force a carrier to change, say, total loss settlements. go on the web to doi. this is the department of insurance. they are very helpful & you can file a complaint on-line w/them. they are for the consumer. they are not biased toward the insurance companies. i have gotten great results w/them.