Thanks for the information but i can't seem to find anywhere who has precedence when we have a seperate sell to and bill to customers.
 
Does it take Bill to Customer Document Layouts or Sell To Customer Document Layout ?
 
So for a sales order , will it look at the document layouts for the sell to customer or bill to customer for all documents ?
Order Confirmation
Shipping Note
Invoice 
Creditnotes 
...
 
Thanks for the response