I seem never to need to use Serializable, whether or not I'm using Remote or Local interfaces. I thought if you use a Remote interface, then you must...or not? When is it required that you use them? Are EJB3 entities the only thing that would need to be Serializable, or is there anything else as well (e.g. session beans, utility classes, etc)? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995753#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...