Or at least issue an automatic judgement against the fraudulent mother to re-pay the amount of child support extorted when the child turns 18.
The judgement may not be collectable, but if there is now vigorous enforcement of child support, there should be just as vigorous and equal enforcement regarding paternity fraud. However, I am still in favor of the "father" paying support until 18. The child is an innocent bystander in this situation.
LOL.
I only favor that in the spirit of the fool getting what he deserves for being idiot enough to marry in a society so badly confused as the modern.