TESCO was named and shamed yesterday as one of seven businesses convicted of failing to display prices properly.
The supermarket's outlet at Dundrum, south Dublin, was fined €1,500 and ordered to pay €2,000 in costs for failing to show the price of grocery products.
The breach was revealed by the National Consumer Agency (NCA), which yesterday published a list detailing actions it has taken against traders.
The list is the first of its kind to be released by the agency since it was established in 2007.
The move comes in the wake of claims that the NCA was not taking direct action to protect consumers from being ripped off by businesses.
Ann Fitzgerald, chief executive of the NCA, last night said she was revealing offenders as a warning to other businesses.
"To avoid intervention by the agency, businesses should make sure that they are complying with all consumer laws," she said. She added she intended to publish the list twice a year.
The Department of Enterprise, Trade and Employment said the list was sending out a message that the NCA was actively using its powers to deliver for consumers.
However, Fine Gael and the National Consumer Association said stiffer penalties must be issued to those who breach consumer law.
Fine Gael TD Simon Coveney said the fine issued to Tesco was a "joke", adding stiffer penalties were needed.
Michael Kilcoyne, of the National Consumer Association, welcomed the list, but said the penalties issued needed to be "10 times" the current amount imposed.
The Number 1 shop, on Kevin Street, Dublin 8, was one of the seven businesses convicted for price display offences. It was fined €3,450, plus costs of €500.
Power's Londis supermarket, in Edenmore Shopping Centre, Dublin 5, was fined €800, plus costs of €500.
Thomas Welby, of Gala stores on Main Street, Oughterard, in Co Galway, was also fined €300, plus costs of €1,500.
Thomas Farrell and Sons (Garages) was fined €3,900 for price display breaches on motorcar accessories at the Pickardstown Service Station and Tramore Service Station, Tramore, Co Waterford.
Two other convictions related to two licensed companies -- McDonnells, in Newbridge, Co Kildare; and Westar Hotels Ltd, of Abbeylands, Co Kildare, also failed to display price lists at their premises.