Simon Willison’s Weblog

The law behind "tell a friend" services. Useful guide based on UK law, updated in July 2008.

Posted 28th July 2008 at 10:49 am

Recent articles

Large Language Models can run tools in your terminal with LLM 0.26 - 27th May 2025
Highlights from the Claude 4 system prompt - 25th May 2025
Live blog: Claude 4 launch at Code with Claude - 22nd May 2025

spam 23 law 30 marketing 18 tellafriend 2 uklaw 2 viralmarketing 1

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe