Verifying Personal Information/Password

I run a help site for a Virtual Pet Community. With trying to stay within the Terms and Conditions of the Community, I must prove that I cannot view the chosen password of a user. How can I go about verifying this for the Administrators of the Community?

No on is able to know the password of another user in the same forums not even the admins buddy so don't worry about this your members are safe .

umm.... take a screen shot of your admin panel of a members profile.
it will show
Username their name
password *******

but if you are the admin, of course you could always change their password via the admin panel. It would be hard to "prove" that would never be done.
And sometimes, it needs to be done legitimately, when a member can't log in etc.