Hi, ok I could use required="true" but what do you mean by: anonymous wrote : @NotNull has no effect on validation. I thought Seam simply calls the Hibernate validation framework. What other effect has this annotation? Why are the examples given in the Seam distribution using the @NotNull annotations? The documentation of the validation frameworks ( [url] http://www.hibernate.org/hib_docs/annotations/reference/en/html/validator... [/url] ) simply explains that it checks if the property is not null obviously. Am I missing something? Thanks, Kurt View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3965974#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...