The trademark UGG has always been the focus of controversy between several snow boot brands and UGG AUSTRALIA. Deckers Outdoor Sports Company has registered UGG brand trademarks in many countries around the world, so that brands containing UGG in other brands are not allowed to enter the registered country's market. However, in Australia, related Australian manufacturers joined forces to form UGG Snow Boot Association to fight Deckers' claim. They said that Australia is the country of origin of UGG, and Australian manufacturers have been making these boots for decades, including selling them to the United States. UGG should be changed into a common name, and Australian courts should maintain UGG as a common name for goods. In the United States and the Netherlands, the court rejected the claim that "UGG" is a common name of goods, and maintained the effectiveness of "UGG" as a trademark of a single brand, so it is not recommended to wear and carry imitation UGG to Europe.