Hi @Anonymous
According to your description, I create a simple sample as following images.
I suggest you enter the formula in a worksheet that has less address data, and drag it down : =VLOOKUP(A2,Sheet1!$A$2:$A$10,1,FALSE)
, then we will know if the address exists on both worksheets
If not, the message "#N/A" will be displayed.
And then you can continue to enter the formula: =FILTER(A2:A7,NOT(ISNA(C2:C7)))
, this formula can find out the duplicate address that without "#N/A".
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