Under the Sale of Goods Act, 1930, "Mercantile agent" means an agent having authority in the customary…

Section 2(9) defines a mercantile agent as one having, in the customary course of business, authority "either to sell goods, or to consign goods for the purposes of sale, or to buy goods, or to raise money on the security of goods". A warehouseman who only keeps goods, a carrier who only carries them, or a broker who only brings the parties together has none of these authorities.