In probate, trust, or conservatorship administration, misappropriation typically refers to a fiduciary (like an executor, administrator, trustee, conservator, or agent under a power of attorney) improperly using assets they manage for their own personal benefit or for purposes not authorized by the will, trust, court order, or law. Misappropriation is a serious breach of fiduciary duty and can result in the fiduciary being held personally liable for the loss (surcharged), removed from their position, sued for damages, and potentially facing criminal charges like embezzlement.