61In that regard, the Court has held that the aim of legal certainty requires the national court seised to be able readily to decide whether it has jurisdiction, without having to consider the substance of the case (see the judgment in Benincasa, C‑269/95, EU:C:1997:337, paragraph 27). As regards the application of that requirement in the context of the particular jurisdiction at issue in the main proceedings, the Court has, on the one hand, held that a court hearing a contractual dispute may examine, even of its own motion, the essential preconditions for its jurisdiction, having regard to conclusive and relevant evidence adduced by the party concerned establishing whether in fact the contract exists (judgment in Effer, 38/81, EU:C:1982:79, paragraph 7).
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