Check out these links of Chip Pearson:

http://www.cpearson.com/excel/Duplicates.aspx

http://www.cpearson.com/excel/NoDupEntry.aspx

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HTH,

RD
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Please keep all correspondence within the Group, so all may benefit!
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"ranvin56" wrote in message
...
I was wondering if there was a way that I could have excell notify someone
if
they are inputting information that has been already inputted in that
column.
I have a spreadsheet that list a lot of data. Several different people will
be able to input this data and I wanted to be able to enable some sort of
flag or warning if a name has already been input.