Worksheet protection should really only be considered a means to keep people
from accidently changing things. It can easily be removed:

http://www.mcgimpsey.com/excel/removepwords.html

"jped" wrote:

Hi, I have a client who created a workbook with a hidden, password protected
sheet included. She sent it out to a client of hers who then faxed back the
worksheets, including the password protected hidden sheet. This person
somehow unprotected the sheet. She claims this person is a novice user who
hardly knows his way around a computer. Is it possible to somehow
"accidentally" unprotect a workbook? Thanks for your help!