Taking out the Trash
Like a big bag of garbage, it's important to remove duplicate members from your database lest they start stinking up the place.
Here is how to get rid of the rotten records that are not detected by the regular duplicate merging process:
Put a number in the Dup Group field for that person and select Save.
It is best to use a multiple digit number like "12121" so you don’t add the person to an already existing Dup Group.
Put the same number in their Dup Group and select Save.
Repeat all of these steps until you have added the Dup Group number to all members you want to merge.