To maintain an updated and immutable record of reconciliation data provided to reconcile an exception relating to one or more cash-based transactions. Exceptions are automatically identified based at least in part on data received from one or more data sources, and corresponding exception case data objects are generated as immutable exception case data objects. Update data is provided for the immutable exception case data objects, causing updates to a corresponding graphical user interface while maintaining an immutable historical record of updates provided for the exception case data objects.