I suggest attempting to register the California order in Arizona and trying to get enforcement services from there to get after him. You can't just obtain a warrant for his arrest.
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There are a couple of different ways to enforce your order. You can request from Illinois that it ask the State of Arizona to go after him. This is a long slow process. You can seek enforcement in Illinois but that state can only enter orders that are not really enforceable beyond its borders. You can domesticate the San Diego child support order in Arizona and start an enforcement case here. This is the best way to go after him epically if you know where he is in Arizona. To domesticate the San Digo Order in Arizona you will need a certified copy of the most recent child support order so that it may be domesticated in Arizona. You can order a certified copy fom the clerk of the court for the cout that ordered the child support. You should contact an attorney in Arizona if you decide to precede to enforce the order in Arizona.
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