duly certified copy
as defined in Commission Regulation (EU) No 1031/2010 of 12 November 2010 on the timing…, Article 3, point (25) (Definitions)
an authentic copy of an original document that is certified as being a true copy of the original by a qualified lawyer, accountant, notary public or similar professional who is recognised under the national law of the Member State concerned to attest officially as to whether a copy is in fact a true copy of its original