Bloggers and social media influencers are being warned they need to be clearer about when content is paid for.
The Advertising Standards Authority is hosting an "educate and inform" event at Facebook's headquarters in Dublin today.
Over 100 agencies, brands and bloggers will be told about when they need to disclose that something is an advert.
The ASAI says it will publish the names and details of anyone who doesn't admit they're being paid to push a product.
The issue has come to the fore recently after a number of social media accounts were created to 'call out' bloggers and influencers, accused of misleading their followers.