FTC disclosure guidance

US law (FTC Endorsement Guides, 16 CFR Part 255) requires you to tell your audience when you earn money from a recommendation. Most other countries have similar rules, such as the UK's CAP Code and the EU's UCPD.

• Put the disclosure next to the link, before the "more" fold, in plain words: "I earn a commission if you buy through my link."
• Video and live: say it out loud near the start and show it on screen. Turn on the platform's paid-partnership label too (TikTok "Disclose post content", Instagram/Facebook "Paid partnership", YouTube "Includes paid promotion").
• Short posts: put #ad or #affiliate at the start, not buried among other hashtags. "#sp", "#collab" or "thanks to" are not enough.
• Only give honest opinions from real use. Don't make income or results claims, or health, legal or financial claims we have not published.
• Every creative kit already contains a disclosure. Keep it in.

Reference: ftc.gov "Disclosures 101 for Social Media Influencers". This is guidance, not legal advice.