Definition of Release note:
Formal document issued by a consignee bank (after buyers acceptance of the associated bill of exchange) enabling the buyer to take delivery of a shipment. It is used in documentary credit arrangements where goods are consigned to a bank as the sellers means of retaining constructive control over a shipment sent against an order.
A note authorizing the release or discharge of something; specifically (Aeronautics) a document releasing (part of) an aircraft as fit for service.
Meaning of Release note & Release note Definition