Abstract: A method and a related system for reconciling data sets from different data sources includes comparing the data sets using static data from the data sets, determining an uncertainty factor whether to reconcile the data sets based on an incomplete match of the static data of data sets, and performing a dynamic matching if the uncertainty factor exceeds a predefined uncertainty threshold value. The dynamic data matching comprises the following: comparing dynamic communication data relating to each of the data sets, determining a certainty factor based on the comparison of the dynamic communication data, and reconciling those data sets whose certainty factor exceeds a predefined certainty threshold value.