In a telemonitoring system, a number of telemonitoring devices collect patient data. If an abnormality occurs, a monitoring center is sent a signal. Depending on the abnormality, the monitoring center may request more patient data in order to analyze and evaluate the occurred abnormality. To this end, the patient may be requested to send the telemonitoring devices to the monitoring center. In order to minimize overhead costs and increase efficiency, the present invention provides a method and system for transferring the requested data to a minimum number of selected devices, preferably one selected device, so that a minimum number of selected devices needs to be sent to the monitoring center.