How to track the child's detail in an AR invoice

Hi,

We have a setup where we supply goods to a supermarket chain whose outlets are defined as children of the main parent company in the customer master table.At the time of entering orders, the clerk enters the outlet's address number as 'ship to' code and the parent's address number appear on the 'Sold to' column automatically. The invoices are also printed in a similar fashion since these details are very well maintained in the SOP(42) tables.

However, when the invoice gets posted to the AR side, traces of the child's information is completely gone. Though there is  customer address number column in the F03B11, it is replaced with the parent's address number.