Case C-409/22, Eurobank Bulgaria: Judgment of the Court (Fifth Chamber) of 11 July 2024 (request for a preliminary ruling from the Apelativen sad – Sofia – Bulgaria) – UA v EUROBANK BULGARIA (Reference for a preliminary ruling – Free movement of capital – Payment services in the internal market – Directive 2007/64/EC – Concept of payment instrument – Power of attorney of an agent acting on behalf of the account holder – Copy of the power of attorney with an apostille certificate – Articles 54 and 59 – Consent to the execution of a payment transaction – Concept of authentication – Unauthorised payment transactions – Liability of the payment service provider for those transactions – Burden of proof)