You can also create a new string column (Concat) and concatenate all the attributes that you want to identify as duplicate. You have to be sure that your data are standardize.
After that, order you new column (Concat) by ascending order.
Create a new integer column (Duplicates) and use this script as field calculator
Be sure that the parser is Python and the "Show codeblock" is checked
uniqueList = []
def isDuplicate(inValue):
if inValue in uniqueList:
return 1
else:
uniqueList.append(inValue)
return 0
Under "Duplicates ="
isDuplicate(!Concat!)
the (!Concat!) is representing the field you want to identify the duplicates
38700 - Identify duplicate field values
After that with editor you gonna be able to delete all the duplicates values.
It's always a good thing to create a copy of the shapefile, feature class, etc... before doind this.