Here we would like to draw your attention to FDUNN transaction code in SAP. As we know it is being used in the SAP FS-CML (Loans Management in FS) component which is coming under FS module (Financial Services). FDUNN is a transaction code used for Dunning Loans in SAP.
It comes under the package for Dunning and Interest on Arrears (FVVD_DUNNIOA). When we execute this transaction code, SAPFVD_DUNNING is the normal standard SAP program that is being executed in background. Transaction code FDUNN is included in the SAP component for EA-FINSERV.
Transaction FDUNN technical data table