76However, according to the Court’s case-law, in order to constitute a restriction on the freedoms recognised by Article 21 TFEU, the refusal to amend the joint surname of the applicants in the main proceedings under the national rules at issue must be liable to cause ‘serious inconvenience’ to those concerned at administrative, professional and private levels (see, to that effect, Garcia Avello, paragraph 36; Grunkin and Paul, paragraphs 23 to 28; and Sayn-Wittgenstein, paragraphs 67, 69 and 70).
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