A method for certified delivery of an outgoing message or messages in a multipoint anonymous, publish/subscribe telecommunications system. The system for utilizing the method and program product is one having at least one publisher (10) and at least one subscriber (20). The method is carried out by first establishing a certified delivery session ledger. Next each outgoing message is labeled with a label including the delivery session name and a sequence number. The labeled outgoing message or messages are then sent to subscribers, and received by a subscriber. Various protocols are described.