We had users getting daily email reminders when they had nothing in their worklist. We are sending daily emails based on a view with this query:
select distinct kait.prncpl_id as PRINCIPAL_ID from krew_actn_itm_t kait
where kait.asnd_dt < sysdate - 1
There were entries in that table for CANCELLED and FINAL documents... to remedy this, we manually deleted rows from that table. Not sure how they got there, dont know how to reproduce, but if this is indeed a problem, maybe there should be a daemon that cleans up this table if inconsistencies can occur...