If a party files a motion to amend a pleading, the party shall attach the proposed amended pleading to the motion. In the event the motion is denied without having reserved the right to do so and to the same extent as if the motion had not been made.If a party files a motion to amend a pleading, the party must attach the proposed amended pleading to the motion. Amendments shall be freely permitted in the interest of justice and the welfare of the child. (2) Other Amendments. In all other cases, a party may amend its pleading only with the opposing party's written consent or the court's leave. If a party files a motion to amend a pleading, the. You should also state that you have filed a new motion for leave to amend the counterclaim and explain the reasons for the amendment. In order to amend the original complaint you would need to file an amended Complaint if you initiated the child custody action originally. You do not need to use an Affidavit since you can just verify the Motion.