A portable control system for use by an agent in the travel industry and the like is disclosed. A reader reads user data from a user identity document and also reads further user data from a token associated with a product or service. A display is provided for displaying a field of view for the agent. In response to the agent positioning the user identity document and token within the field of view, the reader reads the user data from the document and reads the further user data from the token and compares the user data and further user data.