Fill out a new Petition to Modify Divorce Decree. Our experienced modification attorneys can help you modify the terms of the agreement concerning things like alimony, child custody or child support.Fill out a new Petition to Modify. Write "Amended" above "Petition to Modify" on the first page and check the "and Stipulation" box. If you want to modify some aspect of your Decree of Divorce or other Order, you will need to file a Petition. Looking for divorce modifications in Utah? Call Melvin Cook, at 801-746-5075 to speak with an experienced Salt Lake City modifications attorney. You have the opportunity to modify nearly any aspect of your divorce agreements, judgments, or court orders under specific conditions. If you can find common ground, you can then draft a modification agreement together and file it with the court. Divorce agreements are intended to dispose of most issues definitively, without the need to return to the question later on.