Are influencers legally required to disclose sponsored posts?

Yes, it is the law in most major markets, not optional. A paid post or even gifted product counts as a material connection that has to be disclosed.

It is a requirement, not a courtesy. In the US the FTC requires that any material connection between a creator and a brand is disclosed clearly and a material connection includes payment, free product, gifts, commissions or even a close relationship. The UK, EU, Australia and many other markets have their own equivalent rules enforced by their own regulators.

The responsibility sits on both sides. The creator has to disclose and the brand is expected to make sure their creators do, so a non-compliant post is a risk for both of you. The disclosure also has to be hard to miss, upfront and in plain language, not hidden at the bottom of a caption or in a pile of hashtags.

Because the rules vary by country and change over time, treat this as general information rather than legal advice and check the current guidance for the markets you run in. The practical safeguard is to write the disclosure requirement into every creator brief so it is never left to chance. Flinque profile data helps you screen for creators with a clean disclosure track record before you sign.

Both the creator and the brand carry the risk. Regulators have gone after brands for their creators undisclosed posts, so it is not just the creator problem.

Rules differ by country and this is not legal advice but the safe default everywhere is clear upfront disclosure. Check your own market regulator for specifics.