Meaning of letter of advice

let'ter of advice'

Pronunciation: [key]
  1. a notification from a consignor to a consignee giving specific information as to a shipment, the name of the carrier, the date shipped, etc.
  2. a document from the drawer notifying the drawee that a bill of exchange has been drawn.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.