In most states you have the option to file a "divorce by publication." Here is the basic steps.

1. Go to your local newspaper and put a divorce notice ad in the classified section. 2. Mail the divorce notice to the last known address of your spouse. 3. Wait 30 days and get a letter from the newspaper stating that the ad was posted for 30 days. 4. If your spouse no longer lives at the last known address the divorce notice will come back undeliverable. 5. Take your noncontested divorce papers with the letter from the newspaper and the undelivered notice and go to your local courthouse and file a "divorce by publication."

There are more steps and more forms to this process. But these are the main ones. Research more about this topic on the net or contact an attorney.