There isn't any--the search engines don't really care about it unless it qualifies for the DMCA. It's not a copyright issue but a domain name issue. The search engines themselves don't care and nor should you bother them.
Contact your lawyer and send a cease and desist letter to the competitor telling them to turn the domain name over to you. If they don't, then file with ICANN, following the
UDRP.[/quote]
I agree - follow those above suggestions and you should be able to resolve the issue... Sometimes you actually do have to send the letter and follow through to get it to work, but it is necessary...