The order of protection is not valid unless service is valid. That sounds like a defensible case.
This is not a solicitation nor is it legal advice. An attorney/client relationship has not been established. The Law Offices of Scott Gross, PC 631-456-2326 Scottgrosslaw.com
Violations of the order of protection are not prosecutable as you were not properly served. That does not mean that you can't now be served properly and have the order enforced.
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This advice is not meant to create an attorney-client relationship and is a general anwer to the question posed.