Integrating a new carrier using your shipping solution or even if you've been working with a carrier for a while, a change in business scenario could mean that you suddenly encounter error messages you've never seen earlier. 

For assistance, we have listed below the commonly encountered TNT API error messages along with a description available from the TNT Integration Guide. Our goal is to provide you with a quick reference to the error codes, so you can adjust your shipment accordingly to resolve the issue. 

If you cannot resolve the issue by adjusting your shipment transaction data, you may reach out to your shipping solution technical team or your TNT account representative, to see if this can be fixed either through the shipping solution, or can be allowed for your TNT account.

 There are certain API errors where it would be required to work with your TNT account manager, to have limits raised specifically for your account.