Under the previous rules applicable regarding registrability of a trade mark in Greece, a consent letter could admissibly be filed only before the Trade Marks Administrative Commission, not at a later stage, such as pending an appeal before the administrative courts, following the rejection of the trade mark application concerned, provided that (1) the trade marks under comparison are not identical, (2) the consent at issue is not contrary to the public interest and (3) there is no serious danger of the average consumer being deceived.