hey Andrea as of JAX-WS 2.0, there is no supprt for stateful sessions. In JAX-WS 2.1, there is a concept of stateful webservices which is done through ws-addressing. I would not recommend serializing the Handle object, if need be make a representation (or key) of the handle and pass that to the WS client. Each time that key is returned, you can used that to look up the handle. In fact, I don't even think its possible. You can mimick a session by defining the lifecycle of a session (starts at login, ends at logout). Of course, you would have to persist/maintain state on the server side. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4010251#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...