Take a look at the SeamProblemsFAQ on the wiki to understand why some validators aren't run by s:validate View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4041514#4041514 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4041514