Can we "hide" a workflow transition state?

Hi,
in a workflow, the user have to transition the pdf (accept or reject it).
the last transition state, in my case (set expired to xxxx) is drived by the system (if the invoice has not been transitioned since 5 days, the system set it to “Set expired…” and sends a reminder email…

So, as this choice is not for the user, can I “hide” this option so the user only will show “accept” or “reject” ??

If you can get the current user from the workflow context in the transition condition you could only allow a transition when the user is not set. I’m not 100% if that’s works but this is what I would try first.

You could also set explicit access rights on the transition. This should also work.

Thank you, I ll try this.
because im able to get the current user from the workflow context