Duplicate leads are two or more leads we think is the same lead.
We match leads based on phone numbers and email addresses, and if we find matches, we mark the matching leads as duplicates.
You can change the way we match for duplicates from your list configuration.
You can view and manage duplicates from Manage => Duplicates or when viewing the individual leads (when calling them).
Whenever a lead has one or more detected duplicates, myphoner shows a duplicate tab when viewing that lead. From the duplicate tab you can decide how to handle the situation, either by deleting one or more leads, merging them or ignoring the problem.
See also Merge (two leads).
The duplicate warning tab let you easily compare and handle duplicates.