Hidden column becoming unhidden upon forwarding

[Concerned friend]

Has anyone had any problem with forwarding an Excel 2007 spreadsheet in which
a hidden column when forwarded in an email then shows the recipient the
hidden information. Can a hidden column, "unhide" on its own?

 

[Barb Reinhardt]

I'd ask several questions:

1) Are they using Excel 2007 to open the workbook?
2) Is there a workbook_open event that runs to unhide columns?

 

[Dave Peterson]

I've never seen columns unhide when the user is just viewing the worksheet, but
I have seen columns unhide (just temporarily) when building formulas by pointing
and clicking.

When do the columns show up?