How to setup automatic match Debet Invoice and newly created creditmemo

Hi,

I tried to find out which current setup settings are responsible for the automatic matching of a credit memo to an existing invoice.

In January 2025, an invoice was created (2525976) for a service contract with number 00001 (OKS Invoice).

Yesterday, a credit memo was created (2529155) for the same service contract with number 00001 (OKS Invoice).

The newly created credit memo is automatically matched to the debit invoice, as you can see in : Receivables/Account Details (button: activities).

Somewhere in Oracle is a set-up which is responsible for this behaviour.

This setup is done many years ago and nobody know where 😉

I hope that someone can help me to find this setup, so we can undo it.