All names we present to clients are at minimum prescreened against the U.S. trademark database and a Google due diligence search.
Depending on your needs, names are also prescreened by for availability worldwide or in the select countries that are of most concern to you - before being presented.
It's vital that all names are screened prior to a client seeing them. Otherwise you can spend a lot of time talking about names you can't use.
After all, it's only a great name if you can own it.