The signs that cannot be registered as trademarks listed in the 5th article of the Intellectual Property Rights Code - Code No 6769. According to the Code,
• Any sign that does not exist in the brand definition as specified in the brand description,
• The signs that do not have any distinctive characteristic,
• The signs that indicate sort, type, function, quality, amount, mission, value, and geographical resource, or show the date of the production of goods or services, or indicate the other features of goods and services, the marks including these signs or titles above exclusively or base element,
• The signs registered regarding the same or same category goods and services or the same or indistinguishably similar signs with the trademark for which registration application was made on the previous date,
• The signs that are commonly used in commerce, or that help distinguish the members of a certain occupational, commercial, or business group, the marks including these signs or titles above exclusively or base element,
• The signs that exclusively contain the shape or another characteristic that occurred by nature of the good, or signs that are obligatory to come up with a technical outcome, or the signs that contain the formal characteristic or another type of character that creates the core value of the good,
• The signs that can mislead the society about the features, quality or geographical resource of the goods or services,
• The signs that contain the emblems, favors, or titles that were not authorized by the official organs along with the other signs that became widely-esteemed by the public in terms of historical and cultural values,
• The signs that contain religious values or symbols,
• The signs that are against the public rule or general rules of morality,
• The signs that consist of the registered geographical sign or that contain registered geographical sign; cannot be registered as trademarks.