The registration of the trademark with OSIM, EUIPO or another body within the protected territory ensures you that no one can stop you from promoting and using your products or services under the registered trademark. The registration of a trademark confers you the exclusive right to use the trademark in the territory of protection;
Without a registered trademark, you can not stop somebody to promoting and selling products or services under an identical or similar sign;
Without a registered trademark, using a sign for identification of your products or services, you can infringe the rights of a trade mark owner who can take action versus you to prohibit the use of the mark for goods or services in protected classes, asking withdrawal from the market and destruction of the products bearing the mark, with the obligation to pay damages. The damages may be calculated as the profit obtained from the sale of counterfeit goods / services, the loss of profit suffered by the trademark owner and / or moral damages.