One embodiment of the invention is directed to a method comprising, receiving, by a server computer, a request to establish a group identifier for a group. A group identifier is generated for the group. Group invitations to join the group are transmitted and group invitation responses are received. The method further comprises receiving, by the server computer, confirmations to share a group transaction. A plurality of messages are initiated, the plurality of messages corresponding to the plurality of confirmations, where the plurality of messages result in an initiation of a single message to a third-party, the third-party computer being configured to conduct the group transaction according the single message.