Abstract: A distributed system is provided for initiating and managing commissions between commissioners and contractors, the system comprising a network, at least one server, at least one commissioner data processing device and at least one contractor data processing device, each connected to the network. The server is adapted to process a modular application comprising at least a database, a user profile module, a commission module and an accounting module; distribute a user—configurable interface to each data processing device connected to the network for inputting data and displaying database data; identify each data processing device connected to the network as a commissioner device or a contractor device; and configure the user—configurable interface in real time according to whether the data processing device is identified as a commissioner device or a contractor device, and according to whether the user interface is configured for use with the user profile module, the commission module or the accounting module.