Me and my wife has been apart for over 20 years. I haven't not seen her and I don't know where she is. I wnat to move on but need a divorce.What do I

Even though you have been apart for an extrordinarily  long period of time, you cannot get divorced in the state of Wisconsin, unless you have made a reasonable attempt to locate your spouse and have them personally served with the divorce papers. If you can establish to the court that the process server has made all reasonable attempts to personally serve the papers and your spouse cannot be located, in that event, the law (and court) will allow you to resort to "substituted service," where you publish notice in a newspaper and mail the papers to his last known address. When all three of those things have been accomplished by you, the court will allow you to proceed to a final divorce hearing. In regard to your second question, you can look at the Wisconsin Circuit Court web site on any civil or criminal case activity on either one of you; that would tell you if your spouse for any reason had previoulsy filed for divorce in Wisconsin.