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To merge a duplicate record, edit the details page of the person that you wish to keep, and click the 'Merge details with another person' item under the 'Select an action...' dropdown at the bottom of the page.
Use the 'Search for records' function to find the records that you wish to merge, and tick the boxes to select the records you wish to merge into the original record. Once you have selected all of the records that you wish to merge, click the 'Merge selected records' button.
The system will then attempt to merge the selected records, and the following message will appear if the merge was successful:
