“It is a well-established rule of English law that an undisclosedprincipal can sue and be sued upon a contract, even though his name and even his existence is undisclosed, save in those cases when the terms of the contract expressly or impliedly confine it to the parties to it.”
“Where an agent has … actual authority and enters into a contract with another party intending to do so on behalf of his principal, it matters not whether he discloses to the other party the identity of his principal, or even that he is contracting on behalf of a principal at all, if the other party is willing or leads the agent to believe that he is willing to treat as a party to the contract anyone on whose behalf the agent may have been authorised to contract. In the case of an ordinary commercial contract such willingness by the other party may be assumed by the agent unless either the other party manifests his unwillingness or there are other circumstances which should lead the agent to realise that the other party was not so willing.”
“For present purposes the law can be summarised shortly. (1) An undisclosedprincipal may sue and be sued on a contract made by an agent on his behalf, acting within the scope of his actual authority. (2) In entering into the contract, the agent must intend to act on the principal's behalf. (3) The agent of an undisclosedprincipal may also sue and be sued on the contract. (4) Any defence which the third party may have against the agent is available against his principal. (5) The terms of the contract may, expressly or by implication, exclude the principal's right to sue, and his liability to be sued. The contract itself, or the circumstances surrounding the contract, may show that the agent is the true and only principal.”
“for a party to be an undisclosedprincipal it must hence be established that: (1) the agent contracted with and within the scope of the actual authority of the undisclosedprincipal; (2) at the time of the relevant contract, the agent intended to contract on the principal's behalf; and (3), there is nothing in the contract or surrounding circumstances showing that the agent is the true principal and which excludes the making of a contract with an undisclosedprincipal.”
“On appeal in Aspen the Court endorsed the findings of Teare J and held that the terms of the agreement “… tell, at the least very strongly, against the Bank being a party thereto” (per Gross LJ ([2018] EWCA Civ 2590 paragraph [51]). In other words, the express identification of the parties in the relevant agreement was (a powerful) part of the evidential mix but was not dispositive. It is evidence going to, inter alia , whether a party (here the Claimant) was willing to contract with persons other than the counterparty signatory. Where there is an entire agreement clause this is evidence which tends to negative any suggestion that a party intended to sue or be sued by a person other than the counterparty in respect of disputes under the agreement. … For my part I do not think that the entire agreement clause in the terms and conditions necessarily serve to exclude altogether the possibility that there might be undisclosed principals. The language used is not wholly unequivocal and the parties could, had they wished, have expressly stated that the parties thereto were the only parties that could sue and/or be sued. But they did not. On the other hand, I do consider that it is a cogent indication that the alleged agents (the First and Second Defendants) did not intend to act on behalf of an undisclosed third-party principal and that this was also the view of the Claimant.”
“The argument based on assignment illustrates the dangers of proceeding by analogy. There are indeed certain similarities between these two branches of the law. But there are also many differences.”
“Intervention on a sale would under this rule rarely be disallowed, for both in the case of assignment and in the case of undisclosed principal, the liability of the original contracting party to the third party remains.”