What you need to do is stop fooling around and hiding and contact a local divorce lawyer, file for divorce and have her served. That will put into place automatic orders preventing certain transactions - which you should discuss with your attorney as soon as you retain one!
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You have posted 2 questions here. First how to stop disposition of assets - you would need to file for divorce as there are automatic orders which prohit dispostion of assets. Failing that you may get a credit in a divorce for assets disposed of improperly. As to the question that says can she say you vanished, she can and the only way to prevent that is to send her your location by mail return receipt requested. You have many issues going on, the best advice I can give is to have a consultation with a family law attorney about all the issues as soon as possible.
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The Facebook actions are highly not recommended and do violate the concept of no contact in most jurisdictions. As for the control of property and assets, check the orders to see if it gave her control. Even if you dont want a divorce, you may want to find an attorney who can file one, get an order freezing the assets and property, but at the same time send the message that you wish for the situation to restore itself to when the marriage was properly functioning.
Attorney Williams practices FAMILY LAW throughout the State of California and may be reached at (831) 233-3558 and offers free consultations. The response provided in this forum is not intended to create an attorney-client relationship. The information offered in this response is for general informational purposes only and should not be relied upon without further consultation with a legal professional after all relevant facts are disclosed and considered. DANIEL S. WILLIAMS, ESQ. LAW OFFICES OF DANIEL S. WILLIAMS 500 LIGHTHOUSE AVENUE, STE. A MONTEREY, CA 93940 (831) 233-3558 -- OFFICE (831) 233-3560 -- FAX