The officer did ask me to sign not order me, but it still left me with an un easy feeling. Once I got home I thought about it, and was dumb to comply because if I had been in an accident that document could have been used to either refuse or reduce my insurance, and possibly be used in civil action by the other party.
Yeah, I don't know if I would have done that myself. They were collecting evidence from you. It's like talking to a police officer: it's best to not - they can and will use what you say against you.