Quote from: paranoidx on January 09, 2014, 05:30:30 PM

So which three of these addressess should I send my Certified letters to?

HashFast Technologies, Inc.
97 South Second Street #175
San Jose, 95113 United States

HashFast Technologies LLC
649 Mission Street 5th Floor
San Francisco, CA 90291
USA

HashFast Technologies LLC (HashFast)
100 Bush Street, Suite 650
San Francisco, California 94104, United States

They sure do seem to be moving a lot...

All of them. The general rule of thumb when seeking to serve someone: Blanket every possible address you have for them, but do it delivery restricted to an officer of the corporation you know will be at the address (i.e. Eduardo). That way you can prove that he, or an authorized agent, actually got the letter. All certified mail does is provide you with proof that it was delivered somewhere, if you aren't absolutely sure that's the right address you add restricted delivery so you can prove that not only did it arrive, but it arrived in the hands of the right person.