This happened to me once and I will tell you what happened. I served her via the sheriff [or at least tried]. She did the same thing with closing the door in his face. They made a report of it and the next day I sent the same info out priority mail certified RESTRICTED. If you do it restricted ONLY your ex can sign for it not her roomies or whatever and then she claim she never got it but you can't do restricted next day aid, it can only be priority (2-3 days). She also refused to sign for that. I brough that as well as the sheriff's report into the court hearing and everything went in my favor. The stupid part? I was in court for my disability to have the CS lowered a small percentage (just over 10%). Since she didn't show up, the child support was actually abated [I had 50% visitation at that time so it was possible to get it abated]. When she took me to court 6 months later for not paying the judge threw her out of court and threatened to throw her in jail for wasting the courts time by filing contempt charges against me. Last post for a couple days so good luck with this.