In the United States, it is not registration, but actual use of a designation as a mark that creates rights and priority over others. Thus, the rule is that ownership of a mark goes to the first-to-use, not the first-to-file. A trademark search is necessary before filing the trademark for registration. Since trademark law is based only for each country, a deep examination of what trademarks are in use in commerce in the United States is required. Trademark searches include USPTO registrations, USPTO applications, State corporate filings, Domain name registrations and Common-law use. The reasons for this is that trademark law is about using the mark in commerce on goods or to advertise services – so the goal of the search is to find trademarks already in use in the United States.