How To Fix WS871 - No invoicing party or identification object were entered

WS871 - Overview

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 871

• Message text: No invoicing party or identification object were entered

What causes this issue?

For the settlement document type &V1&, settings have been made so that
the invoicing party is not determined directly but rather by means of an
identification object. However, neither an identification object nor an
invoicing party were transferred.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

WS871 - Details

• Certainly! Here's a detailed explanation for the SAP error message WS871: No invoicing party or identification object were entered:
  
  Error Message
  WS871: No invoicing party or identification object were entered
  
  Cause
  This error occurs when you try to create or process a billing document (invoice) in SAP, but the system cannot find or identify the invoicing party or the identification object required for billing. Essentially, the system expects either:
  
  An invoicing party (the business partner who will receive the invoice), or
  An identification object (such as a contract, order, or other reference object that links to billing data)
  
  If neither is provided or correctly maintained, the system cannot proceed with invoicing and throws this error.
  Common scenarios causing this error include:
  
  Missing or incomplete master data for the customer or business partner.
  Missing assignment of invoicing party in the sales document or contract.
  Incorrect or missing reference to the identification object in the billing document.
  Customizing issues where the system expects an