Registering A Dissenter

I can't say that I think of myself as a dissenter. A free thinker maybe, but dissenter no.

A Catalogue of the Severall Sects and Opinions in England and other Nations:
With a briefe Rehearsall of their false and dangerous Tenents 1647 Anno Domini

However I found myself cast in that role recently, when a letter arrived from Computershare PLC.