It depends on the facts of your case. To modify an existing order regarding children in a divorce, custody, or child support case, you need to prove two things. First, you must show that there has been a material change in circumstance since the time of the last order. ‘Material change’ is a legal term, and not every change in circumstances will rise to the level of materiality required. Secondly, you must show that the change you are asking for is in the best interests of the minor child(ren) if it relates to custody or child support. If you are asking for a modification of alimony or some other provision in a divorce decree, it may or may not be modifiable, depending on the language of original order or agreement and what you are asking to change.