Also known as: mere instrumentality doctrine · mere instrumentality test · instrumentality doctrine · instrumentality rule
Written by attorneys · grounded in primary & secondary sources — see below
A corporation so dominated and controlled by its shareholder that it lacks any independent existence or will of its own. The entity functions as an extension of the owner rather than a separate legal person. Courts examine factors such as commingling of funds, failure to observe formalities, and undercapitalization to determine whether the corporation qualifies as a mere instrumentality.
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Darius formed Arts4All as a nonprofit to run after-school programs. He contributed almost no capital, never convened a board, kept no minutes, and paid personal expenses from the single corporate account. When enrollment dropped, Darius closed the entity, leaving teachers unpaid. The court treated Arts4All as Darius's mere instrumentality and allowed the teachers to reach his personal assets.
Associates realized Clark Pipe faced insolvency and began directing all of Clark's cash disbursements to repay Associates' loans first. Clark continued to operate but only as a vehicle to liquidate Associates' debt. Other creditors received nothing. The court found Clark had become Associates' mere instrumentality and subordinated Associates' claims.
A plaintiff must show both unity of interest and ownership between the corporation and the shareholder, and that respecting the corporate form would sanction fraud or promote injustice. The first element is satisfied when the corporation functions as a mere instrumentality because of domination, commingling, or disregard of formalities. The second element requires that allowing the shareholder to hide behind the entity would produce an inequitable result for creditors.
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No. Severe undercapitalization is relevant evidence but insufficient by itself. The plaintiff must also prove that the shareholder dominated the entity and used it to perpetrate injustice. Courts require the totality of circumstances, including commingling and failure to observe formalities, before disregarding the corporate form.
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Yes. The same two-prong test applies to nonprofits. When a founder treats the entity as a personal slush fund, ignores governance requirements, and leaves it unable to pay foreseeable obligations, the nonprofit may be disregarded as the founder's mere instrumentality.
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Repeated transfers of corporate assets to an affiliate wholly owned by the same shareholder support a finding of alter-ego status. Such siphoning shows the original corporation was operated solely for the shareholder's benefit and lacked independent economic substance.
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