Having correct post / zip code format is an important addressing details to ensure that your mails / packages get delivered promptly. Most carriers and destination postal adminsitrator either route the addressess by either city name or post (or zip) codes.

An inaccurate post (zip) code information, mail / packages may be routed to the wrong station, hence causing delay in delivery.

Post (zip) codes format of the some of the destinations as follows:-

represent numbers represent alphabet

Example:
Canada, Toronto

M 5 H 3 E 5