---
title: "Discussion on \"How to Stop an AI Agent from Inventing Nigerian Postcodes\" | Hashnode"
description: "Discussion on \"How to Stop an AI Agent from Inventing Nigerian Postcodes\". On 1 October 2026, Nigeria's postcode changed from six digits to an 11-character code that identifies a single building, such as EK-01-A03-FK-01.\nLanguage models trained before that date still describ"
url: "https://hashnode.com/posts/how-to-stop-an-ai-agent-from-inventing-nigerian-postcodes/6acfa07df5672c904a1a970e"
---

[Feed](https://hashnode.com/feed) /

Discussion

# [How to Stop an AI Agent from Inventing Nigerian Postcodes](https://freecodecamp.org/news/how-to-stop-an-ai-agent-from-inventing-nigerian-postcodes?utm_source=hashnode&utm_medium=feed)

On 1 October 2026, Nigeria's postcode changed from six digits to an 11-character code that identifies a single building, such as EK-01-A03-FK-01. Language models trained before that date still describ

Oct 14 · 18 min read · freecodecamp.org  
Read the article

-   [#ai-agents](https://hashnode.com/tag/ai-agents)
-   [#ai](https://hashnode.com/tag/ai)
-   [#python](https://hashnode.com/tag/python)

## Written by

[Kayode Adeniyi](https://hashnode.com/@mkbadeniyi)

@mkbadeniyi · London, UK

  
[View profile](https://hashnode.com/@mkbadeniyi)

AI Research Engineer

## Responses

Markdown supported · ⌘↵ to post

No responses yet.