A settlement exception is any item that does not settle, or does not match, in the way the records say it should. Typical examples include a card sale authorised but never settled, a payout that arrived for the wrong amount, a transaction settled twice, a credit with no matching record, or a securities trade that was not delivered on the settlement date. Exceptions are usually found during settlement reconciliation, when a firm compares its own ledger with files and statements from banks, acquirers or clearing systems.
Common causes include cut-off timing, conversion differences, unexpected fees, chargebacks, wrong references and system errors. Operations teams log each exception, find its cause and correct it, often holding unexplained funds in a suspense account in the meantime. A failed delivery of securities or funds is a more serious form, known as a settlement failure. Rising exception volumes are a warning sign of control weaknesses and operational risk.