Bring up either one of the records for that constituent. Click on the “profile” tab, and then click on the gray “down arrow” button beside the Edit button to the far right. Select “merge” from the options on the menu. A window will open suggesting the possibilities of similar names to merge. The window gives you the option of which to merge, and which to keep. If one has a more current address information, keep that one. All transactions and interactions from both records will be combined.