You may already have assigned a company code to a credit control area in the Enterprise Structure implementation guide under Maintain Structure -> Assignment -> Financial Accounting.
In this activity you can enter additional
credit control areas which are allowed for each company code, in addition to
this default credit control area.
You can enter these credit control areas in the line item or let the system
determine them from the order data, customer data, or a user exit in the
order. This way you can use the control area as a flexible internal control
instrument and data which has to be posted in the same company code for
accounting reasons no longer has to be managed in the same control
area.
The control area assigned to the company code only acts as a default value and is used, for example, for crediting commitments in the case of non-assignable incoming payments from customers. Otherwise, with every payment, the credit amount is deducted in the control area in which it was also added (as previously).
Enter any additional credit control areas which are to be allowed.