The Competition and Consumer Protection Commission took 40 enforcement actions against 33 traders last year (CCPC).
24 retailers received a fixed payment notice of 300 euros for violation of price display legislation, while 7 traders received a compliance notice with charges exceeding the displayed price.
In one case, Sligo-
McCormack-based car sales are required to provide a commitment to CCPC after providing consumers with false and misleading information related to car mileage.
The company also compensated the affected customers to resolve the breach of contract.
In another case, lifestyle sports received a fixed notice of payment requesting that the delivery fee not be reimbursed to the customer who canceled the order or returned under the Consumer Rights Directive (CRD).
The sports apparel company also received a compliance notice as it failed to provide consumers with information about the cancellation of the rights to a remote contract.
At the same time, Powercity received two compliance notices on the provision of misleading information to customers about their legitimate rights and the failure to provide the right of information to cancel the remote contract.
In 2016, CCPC conducted 150 unannounced visits to traders across Ireland.
The chairman of CCPC Isolde Goggin said that the latest consumer protection list shows that "traders need to comply with consumer protection laws and CCPC will not hesitate to take enforcement actions, including prosecution, if they do not comply ".
She added: "Our nationwide inspections resulted in 27 fines being paid by traders who failed to show the price.
"In 2017, we will continue to conduct unannounced visits to retailers across Ireland and take appropriate enforcement actions against retailers who do not comply with pricing legislation.