Every action for divorce or legal separation begins with the petition. The Petition for Dissolution of Marriage or Legal Separation with Children is used when there are minor children of this marriage. Complete sets of the forms needed for divorce may be found on this page (see below). The Friendly Divorce Guidebook for Colorado, used by mediators, lawyers, and anyone doing their own divorce, contains a complete explanation of this complex process, and can help you negotiate a fair and workable settlement.