How can we use multiple tags or tags in a single JSF page?

Question

My problem is that I have 2 forms in a single JSF page each having its or tag. As we know the message/messages

Answer 1

If you're using JSF 2, then you could just submit and update the form by ajax. This allows for partially updating the view.

<h:form>
    <h:messages />
    ...
    <h:commandButton ...>
        <f:ajax execute="@form" render="@form" />
    </h:commandButton>
</h:form>

<h:form>
    <h:messages />
    ...
    <h:commandButton ...>
        <f:ajax execute="@form" render="@form" />
    </h:commandButton>
</h:form>

Or if you can't/don't want to use ajax for some unobvious reason, or are still using the legacy JSF 1.x, then check in the rendered attribute of <h:messages> if the desired form is been submitted or not.

<h:form binding="#{form1}">
    <h:messages rendered="#{form1.submitted}" />
    ...
    <h:commandButton ... />
</h:form>

<h:form binding="#{form2}">
    <h:messages rendered="#{form2.submitted}" />
    ...
    <h:commandButton ... />
</h:form>

The <h:message> shouldn't have this problem by the way, in contrary to what you're implying in your question.