Need to control Intercompany Cross charge transaction

Hi,

I have a scenario where a resource from Singpore( Legal Entity - Singapore) has charged a project belonging to Hongkong ( Legal Entity - Hongkong) . Clearly this is a cross charge type of Intercompany and we could see this in Expenditure Inquiry form for the project (Belonging to Hongkong) showing cross charge type 'Intercompany'

My client says that they have not setup the application for intercompany cross charge ( intentionally). Is there any reason (unintentional) which we need to check to control/restrict this intercompany cross charge transaction.

FYI-

Provider/Receiver controls not set up at Singapore OU from singapore LE