You cannot mail on behalf of the requested customer [Solution]

Modified on Mon, 05 Aug 2019 at 07:17 PM

When processing orders, you might come across the "You cannot mail on behalf of the requested customer" error.



This error is shown when you are using one merchant's API keys (Key-Customer-Contract number) with a Customer and/or Contract number not associated to it.


3rd Party Billing is NOT supported by Canada Post. You need separate merchant API keys for each mailed on behalf account



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