Here we would like to draw your attention to SEPM_OIA_DUN_CUST transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).SEPM_OIA_DUN_CUST is a transaction code used for Customizing for Dunning Run in SAP.
It comes under the package S_EPM_OIA_DUN.
Transaction SEPM_OIA_DUN_CUST technical data table
|Purpose||Customizing for Dunning Run|