Article 5 1

1.   By way of derogation from Article 4(1) and (2), where all payment service providers involved in the payment chain are established in the Union, transfers of funds shall be accompanied by at least the payment account number of both the payer and the payee or, where Article 4(3) applies, the unique transaction identifier, without prejudice to the information requirements laid down in Regulation (EU) No 260/2012, where applicable.