Yes, even when both parties agree to a change in divorce decree terms, they must still file a petition for modification in the Texas family court where the divorce was finalized. While the parties can seek to represent themselves in divorce decree modification proceedings, it is always advisable to talk to a qualified Texas divorce attorney first. As a legally-binding court order, a divorce decree can only be modified if correct procedures are followed. Not all requests for modification are granted by the court, especially if they involve child support. And sometimes, one party later regrets agreeing to the modifications that were granted by the court. To make sure you are being protected during this process, it is best to seek legal advice before you and your ex decide to go the DIY divorce modification route.