Relations of Partners to Third Person 21 July 2026· 5 min read

    Write a note on the implied authority of a partner.

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    Conceptual Basis: Mutual Agency under Section 18

    The starting point for understanding implied authority is Section 18, which declares that, subject to the provisions of the Act, a partner is the agent of the firm for the purposes of the business of the firm. This provision gives statutory shape to what courts have long described as the true character of partnership — a branch of the law of principal and agent, as Lord Wensleydale observed in the celebrated case of Cox v. Hickman. Because the very definition of partnership in Section 4 requires the business to be "carried on by all or any of them acting for all," the law necessarily invests each partner with authority to represent the firm, since requiring the consent of every partner for every transaction would make ordinary trade impossible. The Act's own illustration captures this dual character neatly: where A, B and C are partners and an outsider D deals only with C, then as between C and D, C is a principal, but as between C and A and B, C is simultaneously their agent, with the result that A, B and C may all sue and be sued by D.

    The Statutory Test: Section 19

    Section 19(1) provides that, subject to Section 22, the act of a partner done to carry on, in the usual way, business of the kind carried on by the firm, binds the firm, and the authority thereby conferred is called the partner's "implied authority." The touchstone of this test is not whether the co-partners specifically sanctioned the act, but whether it falls within what would ordinarily be done in carrying on a business of that particular kind — a question of fact depending on the nature of the business and the customary practice of persons engaged in it. This is why the same act may bind the firm in one trade but not another: what is usual for a commission agent's business may be wholly unusual for a manufacturing concern, and courts look at both the nature of the business and prevailing trade usage to answer the question.

    Section 19(2) then enumerates matters that fall outside a partner's implied authority in the absence of any contrary usage or custom of trade. In the absence of express authority, a partner cannot ordinarily submit a dispute relating to the business to arbitration, open a banking account on behalf of the firm in his own name, compromise or relinquish any claim or portion of a claim by the firm, withdraw a suit or proceeding filed on behalf of the firm, admit any liability in a suit or proceeding against the firm, acquire immovable property on behalf of the firm, transfer immovable property belonging to the firm, or enter into partnership on behalf of the firm with another person for a different business. These are treated as extraordinary acts, exceeding the routine conduct of trade, and a firm is not bound by them unless it subsequently ratifies the partner's action.

    Restriction and Extension: Section 20

    Section 20 allows the partners, by agreement between themselves, to extend or curtail any partner's implied authority. Such an internal arrangement, however, binds only the partners inter se; it does not affect third parties dealing with the firm in good faith unless those third parties have actual notice of the restriction, or do not know or believe the person they are dealing with to be a partner at all. This rule protects the reasonable expectations of outsiders who transact with an apparent partner acting within the usual course of the firm's business, reinforcing the broader principle under Section 18 that a partner remains the firm's agent for business purposes regardless of private limitations unknown to the outside world.

    Judicial Elaboration

    Courts examining the scope of mutual agency have consistently returned to the question of whether the person seeking to bind the firm actually had authority to act for the admittedly existing partners, and vice versa. In a case concerning two independent firms jointly financing a pledge transaction, the Bombay High Court held that although one partner can always bind another in matters within the scope of partnership business, subject to Section 20, the defendants there had failed to show that the two lending firms were, in fact, agents for one another; there was nothing to suggest that either pledgee could act on behalf of, or bind, the other, and the mere fact of co-lending through jointly signed cheques did not establish the necessary relationship of mutual agency. This underscores that implied authority presupposes an existing partnership relationship — it cannot be inferred merely from parties acting jointly in a single transaction. Similarly, the reasoning applied in Chimanram v. Jayantilal reaffirms that whether an act binds the firm depends on whether it was of a kind ordinarily done in carrying on that particular business, keeping the true agency character of partnership constantly in view. The Act's treatment of the phrase "acting for all" under Section 4 makes the same point from another angle: a partner who takes no active role in day-to-day management does not thereby lose implied authority to bind the firm, because the essence of partnership lies in each partner being agent for the others in carrying on the partnership business, regardless of the degree of his personal participation.

    Illustration

    Suppose A, B and C are partners running a wholesale grain trading firm. A's purchase of grain stock on credit from a regular supplier falls comfortably within the usual course of such a business and binds the firm under Section 19(1), even without B and C's specific knowledge, since procuring stock on credit is a routine incident of grain trading. If, however, A attempts to sell the firm's warehouse to raise funds without consulting B and C, this falls within the excluded category under Section 19(2), since transferring immovable property of the firm lies outside implied authority, and the sale will not bind the firm unless B and C ratify it. Suppose further that the partnership deed privately restricts A's authority to purchases below a certain monetary limit, and A exceeds that limit while dealing with a supplier unaware of any such restriction. Under Section 20, the firm remains bound to that innocent supplier, because the private limitation on A's authority cannot be used to defeat the reasonable expectations of a third party who has no notice of it.

    Concluding Observations

    The doctrine of implied authority thus performs a delicate balancing function within partnership law: it enables the practical conduct of trade by allowing any partner to bind the firm in matters usual to its business, while simultaneously excluding a defined category of extraordinary acts from that authority so as to protect the firm from being bound by unusual or hazardous dealings undertaken without proper sanction. Section 20 completes this scheme by allowing partners the freedom to calibrate authority as they see fit internally, while ensuring that this freedom does not become a trap for innocent outsiders who deal with the firm in good faith, unaware of arrangements confined to the partners themselves.

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