Abstract: An intermediary-based, computer-implemented transaction-system for conducting transactions between entities connected via a social graph of a virtual social network is disclosed. The system includes at least one virtual social network platform storing social graphs connecting virtual entities, the virtual social network providing at least one virtual communication channel allowing the virtual entities to communicate with each other, at least one social graph includes a connection between at least one individual and at least one business partner. A transaction provider is configured to read-out the social graph and register the connection, and one or more mobile devices are configured to execute a transaction application provided by the transaction provider. The transaction application uses the registered connection to enable an individual to create a transaction with the business partner.