The ASA is the Advertising Standards Authority, a British regulatory body that promotes legal, decent and honest advertising across all media. The ASA regulates advertising content in the UK by investigating complaints to determine if ads comply with advertising standards codes. It covers a wide range of advertising from magazines and newspapers to TV, radio, internet and social media ads. The ASA requires a complainant's full contact details to verify complaints, and may disclose their identity if they consent or if the complaint is against a competitor. Complainants can appeal rulings based on new evidence or flaws in the investigation process.