To merge a duplicate record go to the contact and click on the 'Settings' tab
Possible duplicates will appear in the information sidebar ('Meta'). Click 'merge duplicate into current record' on the relevant contact to pull together their personal data, as well as memberships, donations, tickets and payments, into one record.
Please note: Merging cannot be undone. Proceed with caution.
Merging all of the related records to a contact may take time. Merge requests are queued, when complete a journal record is added explaining which records and fields have been merged.