Filled Action for requisitions?

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This may not be an issue for most companies, but we are being challenged by user adoption in certain countries.  This typically occurs after the requisition is posted and then everything else happens outside of Taleo.  Once the recruiter has hired the candidate, they typically go back into Taleo and in the "more actions" drop down of the requisition, they have an option to choose "Fill".

If this is a challenge for other organizations, how have you restricted your users from this option?

From a Taleo perspective, can we opt out of this as an option in the drop down menu?  This would be our first choice as we are attempting to drive every requisition through Taleo and every requisition must have a candidate hired, thus not allowing users to Fill a requisition without a candidate.