KEY POINTS
  • Campaign financing is a particularly sensitive topic in Europe. There is no common European rule for party funding; instead, parties in certain jurisdictions must comply with their country's own rules.
  • According to the International Institute for Democracy and Electoral Assistance, four out of the 28 European countries do not have any restrictions on foreign donations to political parties.
The flags of the EU member states in front of the European Parliament in Strasbourg, France

The European Union is having a hard job building a sufficient firewall when it comes to election interference, experts have told CNBC.

The European Parliament — the EU's legislative arm — has launched a campaign to tackle online disinformation ahead of its elections in May. But there are certain loopholes that mean there could still be outside influence in the vote.