Powers of attorney and enduring powers of attorney can be withdrawn by signing a revocation of power of attorney form. You can also revoke an enduring power of attorney (medical treatment) by executing a subsequent enduring power of attorney under the Medical Treatment Act 1988 (Vic).
The actual power of attorney document and any existing copies should be collected from the attorney and destroyed to prevent any further use.
Give your attorney a copy of the revocation of power of attorney form.
Anyone who believes your attorney is not acting in your interests can apply to the Victorian Civil and Administrative Tribunal (VCAT) to revoke the authority, if it finds it is no longer in the best interests of the donor. Applications to dispute the refusal of medical treatment should be made to the Guardian and Administration List of VCAT.