====1.1. Create business partners====
Because a 3PL partner can be a customer and a vendor at the same time, in order to handle 3PL partners, create multiple business partner master records for one 3PL partner. 
  * Customer: Create a customer master record for sales deliveries. 
  * Vendor: Create a vendor master record for goods receipt PO’s. 
  * Invoicing customer: Create a customer master record for 3PL invoices. 
For the 3PL invoicing process, link the customer(s) to the vendor and the vendor(s) to the invoicing customer. 

{{ :implementation:wms:config_guide:business_partner_master_data_01.png |Linked Business Partner}}

The vendor has to be entered into the Linked Business Partner field under the Produmex tab in the ‘Business Partners Master Data’ window of the customer.

Similarly, the invoicing customer has to be entered into the Linked Business Partner field of the vendor.

{{ :implementation:functionalguide:3pl:3pl_linked_bp.png |}}

The linking mechanism allows to link multiple customers to the same vendor and multiple vendors to the same invoicing customer.