When you don't have the option of publicly embarrassing the offender by sticking a post-it on his/her forehead, give this workflow a try.
When you forget your password you cannot sign in, so you will have to recruit a colleague's assistance.
For employees who are too embarrassed to admit they forgot their password AGAIN, a webform that can be accessed by all employees and that sends an application to the administrative office can be useful.
On a final note, this allows anonymous submitting, so it is actually the same flow as a "Report sexual harassment anonymously" process.