If the court awarded the car to your husband or if you have agreed in a settlement agreement to give him the car, then you must resort to the court for assistance by filing a motion to compel compliance and/or a motion to permit you to have possession of the car as a result of your husband's failure to comply. If there is no order or agreement and yoru husband is not going along with you verbal agreement, then you may wish to consider a "self help" repossession of the car in a civil and peaceful manner. If the title is in your name and you are going to drive the car, it MUST be insured before you put the key in the ignition. Give the local police notice of what you have done, after you do it, so your husband does not report the car stolen.
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