If you completely delete the passport (wich can only be done online asfar as i know) you won't be able to sign in anymore.
If you mean delete all passports in passwordmanagement: all that will happen is everybody will have to type in their password on sign in again (if you are not sure: don't delete
![;)](images/smilies/msn_wink.gif)
).
Edit: you're welcome
![:D](images/smilies/msn_grin.gif)