Apart from Slovenia, infringement proceedings over money laundering rules were also launched against the Czech Republic, Hungary, Italy, Sweden and the UK. Meanwhile, reasoned opinions were issued on Thursday to Austria and the Netherlands over the same issue.

While official notices mark the launch of infringement procedures, reasoned opinions are the second step that follows if member states fail to provide a satisfactory response within two months.

Unless sufficient action is taken within two months after that, the European Commission may take a member state to the EU Court of Justice.

While all of the member states informed the Commission that they transposed the money laundering and terrorism rules in full, the Commission determined that the legislation adopted did not cover all provisions, the Commission said in a press release.

Slovenia's Finance Ministry responded by reiterating the position that Slovenia transposed the rules in full. However, the ministry will address the issues pointed out by the Commission in legislative changes that are already in the works.

"The shortcomings... do not in any way limit the implementation of relevant measures in Slovenia or elsewhere in the EU," the ministry said.

The other two warnings from the Commission both apply to the single market regulation. The Commission issued reasoned opinions to Slovenia and 23 other member states to ensure the full implementation of EU rules on the recognition of professional qualifications.

Moreover, Slovenia is also one of 15 member states to face infringement proceeding for not complying with EU harmonised product rules by failing to transpose harmonised rules for cableway installations, personal protective equipment and appliances burning gaseous fuels.

Member states had to set up penalty systems to deter businesses from violating the harmonised rules, the Commission noted.