I would speak to an attorney, at least for an consult, before communicating directly with ex or mrs. ex. I say that because ex already knows he' s out of compliance, and, it did't happen by accident - in fact, it was very much premeditated - i.e. he's already shown his true intentions. Therefore, any further communication you have with him before the property is secured, if necessary, may give him (through his wife), the ability to make this process even more difficult.