When are Register Alert notifications sent?

For outgoing communications: email alert notifications are sent once the events in question are coded by the EPO. Depending on the procedure, the communications to which the events refer are accessible in EP/UP All documents, either on the same day or with a few days' delay. For more information on this, see Register events. 

For incoming communications: alert notifications are sent once the communications in question are coded by the EPO. This explains why a document in EP/UP All documents can have a date that precedes the date of the Register Alert notification.