When a marriage is headed for an irreparable breakdown, it makes sense to prepare for divorce. Planning for that eventuality can provide many benefits. By planning, you can better protect your rights and assets. And it can lay the groundwork for a successful transition to life after divorce.
It seems to make sense: You and your spouse agree that your marriage is over and you believe that you can handle an amicable split on your own--saving you a bundle in attorney's fees. Neither of you thinks it makes sense to involve a lawyer when you can file the paperwork on your own.