Ultra vires acts are any acts that lie beyond the authority of a corporation to perform. Ultra vires acts fall outside the powers that are specifically listed in a corporate charter or law. This can also refer to any action that is specifically prohibited by the corporate charter.
The roots of the term are from a Latin phrase that means beyond the power.
These acts cannot be legally defended in court. They will, in fact, leave the corporation vulnerable to lawsuits by employees or other parties.
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