The Court of Justice delivered yesterday its judgement in case C‑555/18 (K.H.K. v B.A.C., E.E.K):

“1. Article 4(10) of Regulation (EU) No 655/2014 […] to facilitate cross-border debt recovery in civil and commercial matters must be interpreted as meaning that an order for payment, such as that at issue in the main proceedings, which is not enforceable, does not constitute an ‘authentic instrument’ within the meaning of that provision.

2. Article 5(a) of Regulation No 655/2014 must be interpreted as meaning that ongoing proceedings for an order for payment, such as those in the main proceedings, may be regarded as proceedings ‘on the substance of the matter’ within the meaning of that provision.

3. Article 45 of Regulation No 655/2014 must be interpreted as meaning that judicial vacations are not covered by the concept of ‘exceptional circumstances’ within the meaning of that provision”.

Source: here