48In particular, EU law does not prevent the Member States from imposing, where appropriate, a fine or financial penalty proportionate to the seriousness of the offence, in order to penalise non-compliance with formal requirements (see, to that effect, judgment of 9 July 2015, Salomie and Oltean, C‑183/14, EU:C:2015:454, paragraph 63 and the case-law cited).
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