• Trademarks that are descriptive of the products or product quality (for example, TASTY PEARS cannot be registered for fruits)
• Full names and surnames unless they have acquired a secondary meaning (for example, TAYLOR may be registered trademark as it has a secondary meaning but Anderson may be unregistrable since it’s only a surname)
• Names of products that you registering, even in a foreign language (for example, you can’t register КРЕМ for creams as КРЕМ means CREAM in English when translated from Russian)
• Places of origin. You can’t register French Candy for candy and chocolate originating from France.
• Trademarks identical to Official government marks (aka Official marks), emblems, flags.
• Obscene and offensive trademarks (for example, CANADIAN AS FUCK is unregistrable whereas FCUK is registrable)
• Portraits and signatures or living or dead individuals
• Trademarks that are too close to another previously filed or registered trademark
• Trademarks that are merely informational (for example, BLACK LIVES MATTER)

How to avoid filing for a trademark that’s not registrable? Conduct thorough trademark search before filing a trademark.