The De-duping capability is done by comparing the current data amongst the vendors specific parameters. The data can be scrubbed up against the source only, source group, globally or not at all. This is set up in the source information when you edit or first create the source.
We have set up a standard list of dupe fields which are as follows: First Name, Last Name, Address, City, State, Zip, Phone, Email, and Date of Birth.
There are three total dupe fields in which you will be allowed to choose from. Additionally to these we are willing to customize a dupe field to your specifications if need be. The Dupe Check Timeframe we have set up is by month. 1,2,3...12months, and if the timeframe is disabled the data is checked amongst all time.