It is important to note that Postal code look ups are not as accurate as address look ups. However, they do guarantee a higher conversion rate for your campaigns.
You may sometimes get inaccurate results - this doesn't mean that the data in our system is incorrect.
Using postal codes is error prone, because a postal code can match multiple boundaries and because postal codes change constantly.
Our tools gives you the option of choosing either postal code or addresses as look up options.
Our developers - in collaboration with Open North - are working hard to make postal code based look ups more accurate.
For more on the inherent discrepancies of postal code based look ups check out this article - https://github.com/opennorth/represent-canada/wiki/Tasks:-Respond-to-emails#a-user-reports-an-inaccurate-postal-code