# Unsuccessful Payments (Exceptions)

This section considers the various exception scenarios when a payment cannot be successfully processed:

* [Rejects](/payment-processing/unsuccessful-payments-exceptions/rejects.md) - when a payment is rejected whilst it is being processed
* [Recall requests](/payment-processing/unsuccessful-payments-exceptions/recall-requests.md) - when the Source PSP asks for the funds transferred in an earlier successful payment to be returned
* [Returns](/payment-processing/unsuccessful-payments-exceptions/returns.md) - when the Destination PSP agrees to send the funds back to the Source PSP
* [Disputes](/payment-processing/unsuccessful-payments-exceptions/disputes.md) - when the Source PSP challenges details of the payment
* [Investigation & Enquiry](/payment-processing/unsuccessful-payments-exceptions/investigation-and-enquiry.md) - for establishing the status of payments where no confirmation was received (rare)
* [Reconciliation reports](/payment-processing/unsuccessful-payments-exceptions/reconciliation-reports.md)


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