More than half of consumers are not aware that their rights are stronger when they buy from EU websites.
The Competition and Consumer Protection Commission (CCPC) is reminding people in the run-up to Black Friday and Cyber Monday that it's easier to return goods bought online than from bricks and mortar stores.
It comes as Retail Ireland figures show that online sales have increased by 20% in the last quarter.
Fergal O'Leary from CCPC encouraged people to inform themselves about their rights, saying: "If you buy from a website within the EU, you have very strong protection, in some cases better than if you bought from a bricks-and-mortar store.
"We'd like to see consumers have a good understanding of their rights so they know what to do if something goes wrong."
When buying online you have the right to:
For more see consumerhelp.ie