This works if you have entries in column A and check column B against it (
it will tell you in which row your duplicates are.
Put this in column C and fill down.

=IF(ISNA(MATCH(B1,A$1:A$8000,0)),"no match","ID is in Row: " &
MATCH(B1,A$1:A$8000,0))

"wangan" wrote:

would like error notification when a duplicate entry is made in a specific
column in excel worksheet can this be done with validation function ?