IANAL, so this is my education opinion only: Are you offering on 'myexcellence.com' a similar service to what's already offered on 'excellence.com' ? If so, th

IANAL, so this is my education opinion only: Are you offering on 'myexcellence.com' a similar service to what's already offered on 'excellence.com' ? If so, then yeah, I'd avoid the name-clash as they can legally apply to take ownership of the domain name. If your service is in a completely different market sector, then you should be OK, as there's 1,000s of examples of similar sounding domains but providing very different services.