Abstract: A data processing system processes information associated with an underlying corporate action (CA) and includes a communications module; a message processing module that receives corporate action data; an assignment module that parses the data; an external data feed module queries and receives third party information related to the notice and identifies discrepancies between data elements and the third party information and requests confirmation and/or correction of the information responsive to an identification of discrepancies; an announcement processing module which, responsive to approval of a golden event, generates an announcement concerning the underlying corporate action to one or more of the issuer, a securities exchange, and a securities clearinghouse over the communications network, and responsive to the publication of the announcement, the external data feed module again queries and receives third party information related to the announcement and reverifies consistency of the third party informat