New Driver Insurance Is It Mandatory To Inform Insurance Company Of New Driver?

Is it mandatory to inform insurance company of new driver? - new driver insurance

My son has just the license. We have on our insurance, but all those who have said a young driver to us, it is not necessary because it is very expensive. No need to let her know that he received his license, he would be recorded in our vehicles as if they had borrowed the car. We argued that it would be covered by your policy, and our son did not, so he will not be covered. Is that true?