The European Investigation Order (EIO) is a core instrument in judicial cooperation in the European Union. It was established by Directive 2014/41/EU of the European Parliament and of the Council of 3 April 2014 regarding the European Investigation Order in criminal matters.
It replaces Letters of Request for investigative measures between Member States bound by this instrument, provides for mutual recognition of judicial decisions, and simplifies and accelerates cross-border criminal investigations.
The deadline for its transposition by the Member States was 22 May 2017. Since 15 September 2018, all Member States take part in the EIO with the exception of Denmark and Ireland.
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