Abstract: A method for updating information, such as contact or transactional information, by optimizing the match of known data to data within aggregated databases. The known data may include data concerning one or more categories corresponding to an individual or entity, or to a particular transaction, for example. It is determined whether the known data constitutes an optimized match to a first order data set generated using a first order of predetermined ranking criteria. If a match does not exist, it is next determined whether the aggregated data constitutes an optimized match to a second order data set generated using a second order of predetermined ranking criteria. If a match still does not exist, checking for an optimized match continues using sequential order data sets (i.e., third order, fourth order, etc.) generated using corresponding sequential orders of predetermined ranking criteria, until an optimized match is found to exist.