My followup question seems to have arrived out of order with respect to your suggestion. >> Do I record that a GUID is processed before or after I respond to i

My followup question seems to have arrived out of order with respect to your suggestion. >> Do I record that a GUID is processed before or after I respond to it? > My personal favorite approach is ... the receiver records that GUID along with the processed event record. Well, does the receiver record that it has handled that GUID before or after it attempts to handle it?