The theory:
ajaxRendered="true" : area on a page that should be updated as a response on any Ajax request.
"limitToList" attribute allows to dismiss the behavior of the ajaxRendered=true. All output panels with ajaxRendered="true" is ignored.

Now, I need to create 2 pages with validations,
one page based on general template using <rich:messages ajaxRendered="true" > showing all validation errors on a action,

second page where I need to show a error on every event="onblur". On the second page an error is showing using <rich:ajaxValidator event="onblur" /> and <rich:message for="ajaxFelt1" />

 <h:outputText value="Feld1" />
 <h:inputText value="#{capriMBean.ajaxFelt1}" id="ajaxFeld1">
 <rich:ajaxValidator event="onblur" />
 </h:inputText>
 <rich:message for="ajaxFeld1" />

The problem here is that error is rendered twice : with <rich:messages ajaxRendered="true" > and <rich:message for="ajaxFeld1" />

How to show the error only ones, using <rich:message for="ajaxFeld1" /> ?

Option "limitToList" should give us this result, but
<rich:ajaxValidator event="onblur" limitToList="true" reRender="something"/> still makes messages to be rendered out.