Trademark Basics for Domain Names: What a Name Check Can and Cannot Do
Choosing a name that collides with someone else’s trademark is one of the most expensive mistakes in naming. A quick check can catch the obvious cases, but it is important to understand exactly how far it reaches.
What a conflict looks like
The clearest case is a name that is a known brand. Close behind is a known brand with a generic word attached, such as a brand followed by “store”, “app” or “shop”. These read as official or affiliated and are the kind of names that get rejected or disputed.
A subtler case is a word that is both a trademark and an ordinary word, used in a descriptive way. The name check marks these as warnings: the use may be fine, but it deserves a closer look.
How the known-brand check works
The check compares the name with a list of well-known brands and with lists of widely used site and company names. It looks for exact matches, for a brand with a generic word before or after it, and for a brand sitting inside a longer name. Short brand names are treated more carefully, because four letters turn up inside other words by chance.
Matches against the second kind of list, well-known site and company names, are reported as warnings and never as fails, because a shared name is a signal to look closer, not proof of a conflict.
What it cannot do
It is a comparison with lists. It does not query trademark registers, so a registered mark that is not on the lists will pass. A pass therefore means that no well-known brand was matched, not that the name is free to use.
Registers to search yourself
Before you build a business or a brand on a name, search the registers of the markets you serve. For the United States that is the USPTO, for the European Union the EUIPO, and for Germany the DPMA. Search for the exact name, for versions with different spellings, and for similar-sounding names in the same field. For anything important, ask a trademark attorney; this guide is general information, not legal advice.