course of trad

COURSE OF TRADE. What is usually done in the management of trade or 
business. 
     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. 
Sec. 38.