Ryanair, Woodies and the National Lottery were among some of the businesses and companies that caused the public to complain to the Advertising Standards Authority for Ireland.
That's according to the latest bulletin from the ASAI, which contains 15 case reports on investigations by the organisation.
12 of the 15 cases were upheld, with ads across email, social media, online and print found to be in breach of the ASAI Code on grounds related to Misleading, Principles, Availability, Substantiation and Food and Non-Alcoholic Beverages.