COURSE OF TRADE
2. Men are presumed to act for their own interest, and to pursue the way usually adopted by men generally; hence it is presumed in law, that men in their actions will pursue the usual course of trade. For this reason it is presumed that a bank note was signed before it was issued, though the signature be torn off. 2 Rob. Lo. R. 112. That one having possession of a bill of exchange upon him, has paid it; that one who pays an order or draft upon him, pays out of the funds of the drawer in his hands. But the case is different where the order is for the delivery of goods, they being presumed to have been sold by the drawee to the drawer. 9 Wend. 323; 1 Greenl. Ev. 38.