How do I delete a password that I can't remember for a workbook?

[Nlardner]

I have a worksheet that has a different password than my others and I can't
remember the password, how do I change or delete it?

 

[ilia]

It's normally bad form to ask this sort of question on a public
forum. However, you might do a google search and find a utility that
will remove passwords from a workbook, or even list them. Basically
you have to do it programmatically, whether with a macro or a
standalone program. If you're clever, you might even come up with
your own code to do this.

 

[JLatham]

You might try either of these sites:
http://www.mcgimpsey.com/excel/removepwords.html
and one many find useful
http://www.straxx.com/excel/password.html