26Indeed, the opportunities offered by the Treaty in relation to freedom of movement for citizens of the Union cannot be fully effective if a national of a Member State could be dissuaded from using them by obstacles resulting from his stay in another Member State because of legislation of his State of origin penalising the mere fact that he has used those opportunities (see, to that effect, judgments in Morgan and Bucher, EU:C:2007:626, paragraph 26, and Prinz and Seeberger, EU:C:2013:524, paragraph 28).
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