The applications around the identification of duplicate data sets are manifold. As a method in data quality management, for example, it has long been used in setting up data warehouses. Or in analytical CRM when setting up a single view of the customer. Identity Resolution is also nothing new in direct marketing, where it ensures smooth processes by eliminating duplicates. But also in the consolidation of address databases, inventory cleansing, external cleansing, list merging, cluster matching, negative matching (e.g. Robinson list), positive matching for data enrichment or in international matching for different typeset spaces - the correct handling of customer identity data is decisive for success here.