"sisepago" wrote : use the referencedColumnName( ) attribute of @JoinColumn if you want to map a field other than a primary-key column, but this field must be unique I'm guessing you didn't actually read my post. I *am* doing that and it doesn't work correctly. Have a look at the entities I showed in my original post. Thanks anyhow. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3985479#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...