87Consequently, inasmuch as an A1 certificate establishes a presumption that posted workers are properly affiliated to the social security scheme of the Member State in which the undertaking which posted those workers is established, such a certificate is binding, as a rule, on the competent institution of the Member State to which those workers are posted (see, to that effect, judgments of 10 February 2000, FTS, C‑202/97, EU:C:2000:75, paragraph 53; of 26 January 2006, Herbosch Kiere, C‑2/05, EU:C:2006:69, paragraph 24; and of 27 April 2017, A‑Rosa Flussschiff, C‑620/15, EU:C:2017:309, paragraph 41).
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