Co-registration is the practice of collecting leads/subscribers for multiple businesses, on one website’s landing page. A user is required to provide his registration details once to subscribe, but is then presented with an option (checkboxes) to receive email communications from several other related businesses. Advertisers usually pay a stipulated fee to the owner of the co-reg network, i.e. the person displaying their opt-in offers on his subscription page. This method is an easy way of adding a stream of highly targeted suscribers to your mailing list within a short period of time and if done correctly, can prove to be very profitable for you.