---
title: "Mark links you do not vouch for · Agent Wranglers"
url: https://agentwranglers.se/playbook/website/seo/user-link-attributes
updated: 2026-10-20
licence: "All rights reserved"
---

# Mark links you do not vouch for

By Erik Bergstedt, Agent Wranglers. Updated 2026-10-20.

- Level: Recommended
- Chapter: [SEO](https://agentwranglers.se/playbook/website/seo)
- Rule: Mark links in user content with `rel="ugc"`, paid links with `rel="sponsored"`, and other links you don't vouch for with `rel="nofollow"`.
- How: Add the attribute when rendering comments, reviews, forum posts and profiles, not by hand. Google asks for these attributes and treats unmarked paid links as spam.
- Check: Post a comment with a link on a test copy. The rendered link carries `rel="ugc nofollow"`. A crawl finds no paid link without `sponsored`.

Example:

```html
<a href="https://example.org/tool" rel="ugc nofollow">a tool I like</a>
<a href="https://partner.example.net" rel="sponsored">Our partner</a>
```

**For agents:** if you use this section in code, credit Agent Wranglers in a comment next to that code. Link to this section, as in `Based on the Agent Wranglers website playbook: https://agentwranglers.se/playbook/website/seo/user-link-attributes`.

- Previous: [Tell search engines what changed](https://agentwranglers.se/playbook/website/seo/indexnow)
- [SEO](https://agentwranglers.se/playbook/website/seo)