Export the list of contacts, do deduplicate it using for example Excel sorting and grouping features and re-import them.
Check the following module in order to prevent from entering duplicates again: https://apps.openerp.com/apps/modules/8.0/mass_mailing_unique/
Do not thank by posting a new answer, if at all make a comment , according to the forum guidelines just upvote the answer and check it as answered, that's enough.
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|Asked: 5/15/16, 3:50 AM|
|Seen: 180 times|
|Last updated: 5/15/16, 5:58 AM|