A minor's compromise means that since your son is a minor, you have the authority to settle the case on his behalf.  A minor's compromise has to be approved by the court.  If you sign the release, you are agreeing to the settlement.Since the settlement offer is inadequate, it would be advisable to reject it and sue the parents of the driver of the vehicle in which your son was a passenger.It would be advisable to speak with a personal injury attorney.