Another version:

=EXACT(A1,UPPER(A1))

But this does allow:
SIMON #3-1234 JEFFORD
(non-alpha's are ok)

Simon Jefford wrote:

Is it possible to ensure that only capital letters are entered into a cell.

I have tried using a list within data-validation but the cell still allows
both upper and lower case entries.

Any ideas would be much appreciated.
Thanks
Simon

--

Dave Peterson