The car is now paid off you said? so no encumbrance issues.
The only difference between the two forms linked to by myself &
@Docupedia appears to be in relation to personalised number plates. If you don't have those then that is not an issue either.
If your husband were to send a letter of demand for monetary compensation via the civil court, he will discover that being a joint marital asset (divorced or not) the civil court does not have jurisdiction to hear such matters.... If the two of you were to ever file for a property settlement under family law jurisdiction, then the the second hand value of the vehicle (or the amount you sold it for) will have to be declared, regardless of weather you still had the vehicle or had disposed of it.
In short, I don't think you need to be overly concerned with a claim