[quote=@Raineh Daze]
It amuses me that Julianna thinks the clergy don't know.
[/quote]

I think you have the wrong idea here, its just easiest for clergy to verify the presence of an undead[well this is an assumption on my part but typically in fantasy settings the church is usually the most versed on all things undead].  Also its not the clergy that want the evidence it's the nobles.  Even if a majority of the nobles are aware of the fact already its always handy to have concrete proof on hand, especially if the clergy are in on the secret.