What do you mean? What kind of conditions?

For example, you and your wife could negotiate that any support payments from you to her are going to end on December 12, 2005 at 11:56 a.m., and that is fine, so long as you both agree to that. You and your wife are free to negotiate anything you want, for a good reason or a bad reason, so long as it is not an illegal reason. If you hire a lawyer he or she can assist you in making the right choices, otherwise it is best to look at example separation agreements.