It is possible to send a request to more than one providers.
This feature support both the synchronous and asynchronous flows.
When a terminal is configured for synchronous or synchronous with fallback, WebOffice will first contact the provider that is set to "Is Required for purchase" and will send the requests to the other providers after an OK from the first one.
When running asynchronous routing the request will be send to all providers at ones. The terminal will get an OK from WebOffice and print the ticket/receipt. The flow is exact the same as for asynchronous routing.