Different contributor here. Please permit me to assist.
If child support is no longer collectible, it becomes extremely difficult to collect spousal maintenance across state lines! The reason is that a contempt motion is effectively unenforceable interstate, due to the fact that the court cannot enforce "interstate rendition" (e.g., extradition) for a contempt citation. Which means that the AZ court couldn't get law enforcement in any other state to forcibly return you to AZ to face contempt charges. And, a contempt order can't be enforced in a different jurisdiction. This leaves only ordinary collection actions, i.e., a money judgment as a means of satisfying a support obligation -- which creates additional problems, because the cost of collection can be quite high, and the difficulty in finding assets equally costly -- especially, if you were to relocate to a different state (or nation) and not inform your ex as to your new residence.
However, if you choose to remain in the same state jurisdiction as your spouse, then you are not going to be able to avoid paying spousal maintenance -- because, if you don't pay, the court will order you incarcerated until you change your mind.
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