How to force an Action before another one is perfomed

Hi SAP Gurus!

The scenario is the following: the user have to insert a "retirement" action for a person; if the person who is retiring has also a temporary attribution to another organizative unit, he must return to the original organizative unit with a "come back" action before being retired.

So if the user start a retirement action, we have to stop this action and automatically insert the "come back" action before this one.

Is this thing possible in any way?

I tried with dynamic actions, but in this way before trigger the "come back" action you have to save the "retirement" one.

Thank you, regards.

Stefano