--- title: "TNT: ERROR \"VALID IS 12 CHARACTERS\"" description: "TNT: ERROR \"VALID IS 12 CHARACTERS\"" --- [Passer au contenu](https://knowledge.shippingbo.com/https/knowledge.shippingbo.com/tnt-error-valid-is-12-characters#main-content) Français Afficher le sous-menu pour les traductions [![bleu et blanc\_Sigle+logo SBO\_300dpi (2)](https://knowledge.shippingbo.com/hs-fs/hubfs/bleu%20et%20blanc_Sigle+logo%20SBO_300dpi%20(2).png?width=160&height=30&name=bleu%20et%20blanc_Sigle+logo%20SBO_300dpi%20(2).png)](https://knowledge.shippingbo.com/?hsLang=fr) Ouvrir la navigation principale Fermer la navigation principale - Français Afficher le sous-menu pour les traductions Bonjour. Comment pouvons-nous vous aider ? - Il n'y a aucune suggestion car le champ de recherche est vide. 1. [Knowledge base](https://knowledge.shippingbo.com/?hsLang=fr) 2. [Erreurs fréquentes & comment les éviter](https://knowledge.shippingbo.com/erreurs-fr%C3%A9quentes-comment-les-%C3%A9viter?hsLang=fr) 3. [FAQs - Erreur à la génération des étiquettes](https://knowledge.shippingbo.com/erreurs-fr%C3%A9quentes-comment-les-%C3%A9viter?hsLang=fr#faqs-erreur-%C3%A0-la-g%C3%A9n%C3%A9ration-des-%C3%A9tiquettes) 25 octobre 2026 # TNT: ERROR "VALID IS 12 CHARACTERS" You are trying to generate a label with the carrier TNT but you receive the following error:  *"API response: The field 'receiver.contactFirstName' has an invalid size. Valid is 12 characters."*   This error is returned to us by TNT's services: their systems do not allow more than 12 characters per field.    ✅**Solution:** you need to change the value here so that it is shorter than 12 characters.    #### Contact us 📬: Questions about this feature? Feel free to write to us [here](https://support.shippingbo.com/?hsLang=fr) so that we can answer your questions. [![Chill listening crop-3](https://knowledge.shippingbo.com/hs-fs/hubfs/Logo%20shippinggbo.png?width=104&height=24&name=Logo%20shippinggbo.png "Chill listening crop-3")](http://shippingbo.com) Copyright © 2026, Shippingbo