I'm not sure how you would find out, but I do believe that if you have not associated yourself with the company through your profile and the partner portal, they are not able to use it. I have not signed any deal or contract with my company, but have associated myself with them through my profile and the partner portal. This allows them to use my certifications towards partnership requirements.
If you really don't want them using you for partnership requirements, make sure you remove them from your profile and disassociate from them everywhere you can.
For a purpose I did some analysis of discussion ratings. I would like to
share those numbers as they may interests someone. I analyzed rating of
discussions in LAN, Switching and Routing community. Overall statistics
Total number of discussions 72029 100....