The European Securities and Markets Authority (ESMA) has published a thematic note setting out how firms should make sustainability-related claims in non-regulatory communications, aiming to support clear, fair and not misleading statements. The note outlines four guiding principles and is aligned with previous work by the European Insurance and Occupational Pensions Authority and the European Banking Authority. The thematic note provides practical do’s and don’ts, with concrete examples of good and poor practices drawn from observed market behaviour. It focuses in particular on sustainability credentials such as labels or awards, given their frequent use in retail-investor focused communications, and it does not introduce new regulatory or reporting requirements.