I am unclear about what you mean that the court  "closed the case" when she was 18.  Once a matter is settled and the money placed in an account for the benefit of the  minor child the work of the court is completed. However, a conservator or trustee of the funds can continue to take fees if he actively administers to the trust.  If you believe that your daughter can indeed handle the funds on her own then you can petition the court to dissolve the trust formally as it already has by its terms alone (her reaching 25).  What I am gathering here is that the trustee does not believe that she is capable of doing so and is going to petition the court to continue the trust.  He ca, but it does not mean that he wil win.  Get legal help here.  Good luck.