Article 15(1) of the Community Trade Mark Regulation states that the Community Trade Mark holder has to put the mark into genuine use in the Community within five years from registration. Even though the regulation does not deal with the extent of use necessary, the Joint Statements uphold that genuine use within one country is enough. However, recent case law from national offices have ruled in the opposite direction, resulting in legal uncertainty concerning how much use that is needed. The courts claimed that use within merely one Member State is not use in a substantial part of the Community and therefore not genuine.This paper shows that it is not satisfactory to define genuine use in the Community by way of analogy to the term substantial part of the territory. The latter derives from the test of reputation concerning a different case entirely. Instead, most indicators point towards a market-oriented approach where national frontiers do not matter. Focus should be on the extent of use being made compared to the market concerned in the entire EU. A case-by-case assessment is required, where all relevant circumstances are taken into consideration.