Surely you need a select many in this case: <h:selectManyListbox value="#{companyHome.instance.states}" converter="#{converters.stateConverter}"> | <s:selectItems value="#{stateList.resultList}" var="state" label="#{state.name}" noSelectionLabel="Please Select..." hideNoSelectionLabel="true" /> | </h:selectManyListbox> - it doesn't make any sense to use a selectOneMenu to put objects into a Collection. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4028983#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...