@QueenCandy23,
QueenCandy23 wrote:But my question is can the courts seize his property of he does not pay child support?
Is his condo a rental property?
Child support payments often become judgments each month they are delinquent. If his arrearage is large, you should get it reduced to a judgment, by the Court. If you haven't gone to court yet, you would obviously need to do that before you could get a judgment. Once you get a judgment, you could pursue his assets as you would trying to collect any judgment. Using the state/government resources to help you is advisable, since they can usually grab any tax refund due to the obligor, and pay you that money to offset the child support arrears.
If his condo is his primary residence, you will likely not be able to attach it. But you might be able to place a child support lien against it.
You really need to either contact a lawyer who can help you obtain the child support, or use the state/government agency charged with enforcing child support payments -- which is usually free.