Motions to Modify, Motions to Set Support, and Other Matters​. Start with Chapter 1 so you learn the steps required to file a Motion to Modify Child Support.At any time up to 14 days before a scheduled hearing, the initiating party may serve and file an amended motion. In this chapter you will learn how to fill out the motion to stop coliform and the affidavit and supportive motion to stop coliform. In this chapter you will learn how to fill out the affidavit and supportive motion to modify child support. Fill in the hearing information on your Motion. You will need to appear in court for the hearing. With the motion, the plaintiff must file an affidavit proving the amount of damages suffered and requested in the complaint. Here is a list of 100 common mistakes that people and their civil litigation attorneys make in Minnesota courts, along with applicable law for each issue. Fill in the hearing information on your Motion.