Payment Event Exception
It is possible for a payment event's tenders to not equal its payments. Such events are classified as unbalanced. For each unbalanced payment event, a record is written to the Payment Event Exception table (CI_​PAY_​EVT_​EXCP). A To Do background process creates To Do entries for records in this table.
Unbalanced payment events cause a record to be written to the payment event exception table with a message indicating the nature of the error.
To view the messages associated with the exception records, schedule the TD-UNBAL background process. This process generates a To Do entry for every record in the payment event exception table.
Fastpath: 
Refer to Unbalanced Payment Events for instructions describing how to correct an unbalanced payment event.