即係現錢, 仲要先錢後貨.
A money order is a payment order for a pre-specified amount of money. It is a more trusted method of payment than a personal check, because it is required that the funds be prepaid for the amount shown on it. Merchants (who may have no recourse in the event that a regular bank check may bounce) may welcome the extra security that being paid with a money order may offer. http://en.wikipedia.org/wiki/Money_order