A communication from one person to another, advising or warning the latter of something which he ought to know, and commonly apprising him beforehand of some act done by the writer which will ultimately affect the recipient. It is usual and perfectly proper for the draper of a bill of exchange to write a letter of advice to the drawee, as well to prevent fraud or alteration of the bill, as to let the drawee know what provision has been made for the payment of the bill. Chit Bills, 102.