What information do you need to find your digital signature on your trademark registration?

The correct choice is the details contained in the electronic registration certificate. This document provides essential information, including the verification of your digital signature associated with your trademark registration. The electronic registration certificate includes specific data that connects your application to your digital signature, thus serving as a valid reference point for confirming the identity of the applicant and their authorization of the application.

Understanding the other options, the social security number directly pertains to personal identification but is not used to locate a digital signature on trademark registrations. The filing date indicates when the trademark application was submitted, which is important for application timelines but does not help in finding the digital signature itself. The company name associated with the trademark is relevant for identification of the entity but does not directly link to the digital signature details. Therefore, the electronic registration certificate is crucial in verifying and locating your digital signature for your trademark.