My 19-year-old son was involved in a car accident. The scene was attended by a tow truck company who said to my son that the car has to be towed as it is now unroadworthy. My son signed the "Authority to Tow" and called me on the phone. I spoke to my son asking, "has the tow truck driver hook up the car yet?". My son said no. I asked to speak to the tow truck driver and I told him not to tow the car (I have a friend with a flat bed truck). The tow truck driver said that as he had signed the authority to tow form it was a legal document. I asked him had he hooked up the car? He replied no. I said "then don't tow the car". He said that as he had swept the road that the tow had commenced. He refused to cancel the tow and took the car. My question is, can an "Authority to Tow" form be cancelled? it is my opinion that the form is just authorising the tow not a contract and can be cancelled. Please assist.