How do I prove that I have no control over this thing?
You don't have to prove anything. You've given them the courtesy of letting them know they have the wrong person, that's it. You can't 'cease' or 'desist' from something you're not doing, any more than you are already not doing it.
If they actually sue you after you've let them know you're not the right person, then you can invest more effort into this... and at that point, they'll be the reckless ones for filing a lawsuit on no evidence.
In the meantime, the most you should do -- milk it for some hits via a blog post -- is all you need to do. You've done it.
Consult with lawyers (off the payment clock, free initial consultations) if you'd like to, but there's no need given that Perkins Coie has just sent you a bit of lawyerly puffery in error.
You don't have to prove anything. You've given them the courtesy of letting them know they have the wrong person, that's it. You can't 'cease' or 'desist' from something you're not doing, any more than you are already not doing it.
If they actually sue you after you've let them know you're not the right person, then you can invest more effort into this... and at that point, they'll be the reckless ones for filing a lawsuit on no evidence.
In the meantime, the most you should do -- milk it for some hits via a blog post -- is all you need to do. You've done it.
Consult with lawyers (off the payment clock, free initial consultations) if you'd like to, but there's no need given that Perkins Coie has just sent you a bit of lawyerly puffery in error.