If you have been separated from your spouse and have lost touch with him or her and don't know where they live, you can still get divorced. You will have to prove that you are unable to find your spouse - whether on your own or through mutual friends or family, and complete a publication process that will have to be provided to the judge. You will not be able to have the judge decide issues related to, for example custody or support, but you will be able to get a divorce. The Court will then retain jurisdiction over the remaining issues.