PROCURE TO PAY · ADVANCED
How do STO, subcontracting, returns, and intercompany procurement work?
The standard external-supplier spine is only one procurement model. Internal stock transfer, supplier processing with company-owned components, returns, affiliated-company trade, and connected systems create different documents, ownership, valuation, and reconciliation evidence.
PROCESS ROLE
Classify the commercial and physical relationship before configuring the document
An STO moves company stock between plants. Subcontracting sends components to a supplier and receives an assembled material or service result. Returns reverse supplier performance. Intercompany procurement introduces separate legal entities and reciprocal accounting. Each path requires its own item behavior and proof.
OPERATIONAL FLOW
What happens in SAP
Read the sequence as one connected business event, not as isolated transactions.
Identify ownership and legal entities
Decide whether value moves within one company code, between company codes, to a subcontractor, back to a supplier, or across an external integration boundary.
Select document and item behavior
STO document types, delivery and checking rules, special procurement keys, subcontracting item categories and component provision, and return indicators establish the executable path.
Post the physical events
Issue, stock in transit, inbound delivery, goods receipt, component consumption, subsequent adjustment, return delivery, credit, and reversals create distinct evidence.
Prove inventory and accounting
Reconcile sending and receiving stock, components at supplier, receipts, invoice or intercompany values, company-code clearing, taxes, price differences, and interface status.
DESIGN & CONTROL
What shapes the result
These controls work together; a locally correct setting can still produce the wrong end-to-end outcome.
Stock transport order
Supplying and receiving plants, STO document type, delivery type, checking rule, one-step or two-step procedure, underdelivery tolerance, shipping data, confirmation control, stock in transit, and cross-company clearing define the transfer.
Subcontracting and returns
Special procurement, item category, BOM or component list, stock provided to supplier, component consumption, subsequent adjustment, delivery and receipt controls, return reason, return delivery, replacement, credit, and price differences protect ownership.
Intercompany and integration boundary
Supplier/customer relationships, transfer pricing, tax, invoice direction, company-code clearing, output or messages, middleware acknowledgements, retries, duplicate prevention, and reconciliation separate business completion from technical delivery.
DIAGNOSTIC EVIDENCE
Prove both sides of the advanced path
A document on one side is not completion. Trace the physical stock, commercial reference, accounting entries, and external acknowledgements.
STO item, supplying and receiving plants, outbound and inbound deliveries where used, goods issue, stock in transit, goods receipt, valuation, clearing, and open quantity.
Components provided, supplier stock, consumption and adjustment, receipt or return movement, replacement or credit, invoice history, price differences, and remaining exposure.
Reciprocal documents, legal entities, transfer value, tax, AR/AP and clearing entries, message IDs, acknowledgements, retries, duplicates, and reconciliation status.
PROJECT MOMENT
Three movements that must not share one design
One motor moves between plants through an STO, another is assembled by a subcontractor using company-owned components, and a defective delivery returns to an external supplier. Each uses a purchasing document, but ownership, movement, invoice, and accounting evidence differ.
- Ownership is explicit
- Document behavior matches the path
- Both physical sides reconcile
- Financial and interface evidence closes
See how demand, sourcing, commitment, receipt alternatives, invoice matching, accounting entries, payment, and clearing connect.