---
title: "Avoid duplication"
source: 18F Guides
source_url: https://github.com/18F/guides
licence: CC0-1.0
domain: engineering
subdomain: 18f-guides
date_added: 2026-04-25
---

If something is written once and links to relevant information easily and well, people are more likely to trust the content. Duplicate content produces poor search results, confuses the user, and damages the credibility of our websites.

If users can find two similar pieces of content on a subject, they might end up calling a helpline or sending an email to the first address they find because they aren’t sure they have the right information.

There are thousands of federal websites. Collectively, they host hundreds of millions of pieces of content. What are you writing about? What are other agencies publishing? Are users across the country and the world seeing a coherent view?

Before you publish something, check that the user need you’re trying to address has not already been covered:

- Search for the content using search engines like Google, Bing, or DuckDuckGo. This is how most users will start, too. If content is already easy to find, duplicating it can lead us to compete with ourselves for search results.

- Often, 18F team members write about a government service, tool, or program. Think authoritatively: What department or agency controls the thing you’re writing about? What information have they produced already? Use [usa.gov][] to search federal, state, and local government websites for the public. 

- Start significant projects with a [content audit][]. Identify how any existing information is used and whether it will be helpful to your users in its current state. If it isn’t, what must change for it to help you address your users’ needs? Focus your work on those changes.

[content audit]: https://guides.18f.gov/methods/decide/content-audit/
[usa.gov]: https://www.usa.gov/
