In Colorado, filing for alimony modification involves confirming a substantial and continuing change in circumstances since the original order. This requires gathering evidence, such as financial records, to support the claim. A motion for modification must then be filed with the court, detailing the changes and requested adjustments. The other party must be served with the motion, and both parties will present their arguments at a court hearing. Finally, the court will decide whether to grant the modification based on the evidence presented. An attorney can guide you through this process, ensuring that all legal requirements are met.