My wife's ex husband routinely does not pay child support. This is in the state of NH, he is currently several thousand behind, claiming he is out of work but is in fact getting paid under the table. He routinely will miss 4 or 5 weeks, then suddenly pay for 2 weeks in an effort to circumvent the system. He just purchased a new truck estimated kelly blue book at 15,000.00 dollars. Can we put a lien on his house on his back child support that he currently owns?