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DAVENPORT, Iowa- An Iowa man is protesting a child support law that requires him to pay for another man's child.

Joe Vandusen thought it was a joke when he received a certified letter from the Iowa Department of Human Resources last month at his home in Davenport, according to WQAD.

"I opened it up and it was child support, for a kid that is not even mine," he said.

The child was recently born to his long estranged wife, and there's no way it's his, he said.

"We've had no contact whatsoever in 16 or 17 years, and the child just turned one year old," Vandusen said.

But by law, Joe is still legally responsible and the state and its Child Support Recovery Unit, are telling him, he had better pay up.

"I explained to her this is not my child. I'm willing to do a paternity test and she flat out told me it does not matter, you're legally married to her. You're going to pay child support," Vandusen said.

The couple broke up but were never divorced, and Iowa law and many other states require husbands to pay child support for any child born during the marriage.

"I think it's wrong, it shows Iowa needs to change their laws," said Vandusen, who has two biological children and is helping to raise two non-biological children with his current girlfriend of five years.

A spokesperson from the Iowa Department of Human Resources says in a case like Vandusen's, by law, he is considered the legal father of the new child, even though he has not been with the mother in nearly two decades.

His only recourse is to petition the court to "de-establish" paternity.

That will require going to court, and hiring an attorney.

Recently laid off, he says he and his family are already struggling financially, and says the lawyer he contacted wanted a $2,000 retainer fee.

"Unless I come up with that magical $2,000 to pay the lawyer, I don't know what I can do," he said.