35An unconditional obligation to provide consumers, in all circumstances, with a telephone number in order to allow consumers to contact traders seems to be disproportionate, in particular in the economic context of the functioning of certain undertakings, in particular small undertakings, which might seek to reduce their operating costs by organising sales or the provision of services at a distance or off-premises (judgment of 10 July 2019, Amazon EU, C‑649/17, EU:C:2019:576, paragraph 48).
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