
Quoting
Mr. Knowitall
If a court empowered a guardian or other person to attend to your mother's financial needs due to her being incompetent, the court's order would terminate the prior POA.
They "failed to recognize" the power of attorney when? Before your mother died? Then you spent your mother's money anyway? You posted this in the guardianship forum - so are you stating that a guardian was appointed and you chose to ignore the guardian's instructions and spend your mother's money anyway? They're taking issue merely with the fact that you spent mom's money, or is the dispute over how you spent the money?