Can a adult sue a parent for child support which he failed to provide when the child was a minor

A parent has a moral obligation to support his/her child financially. However, under the law in order for Child Support obligations to exist there needs to be an order from a court. Where arrears are accrued pursuant to a court order they do not disappear. However, the recipient (the other parent) can erase the arrears, but the court does not have the authority to erase arrears usually.