Aspects of the disclosure relate to using secure authentication tokens to grant power of attorney. A computing platform may receive user input indicating a task and requesting that a power of attorney be granted to an individual. The computing platform may generate an authority token granting the individual the power of attorney to perform the task, and may send the authority token, along with task information indicating the task, to the individual. The computing platform may receive a validation request including the authority token and the task information. Based on successful validation, the computing platform may send validation information to an event processing system. After receiving confirmation that the task has been performed by the individual, the computing platform may update dashboard information to indicate that the task has been completed, which may cause the user device to display a dashboard indicating completion of the task.