1. SAP Help Portal - Transactional documents supported in Managed Gateway for Spend and Network: In the "Receipts" section, the documentation specifies the logic for status determination. It states, "If the receipt type is Received and the quantity is negative, the status of the receipt line item is Corrected against the received quantity." This directly confirms the correct answer. (Access the guide for SAP Ariba Cloud Integration Gateway and navigate to the section on supported transactional documents, specifically for Receipts).
2. SAP Help Portal - How to configure receipt and return delivery integration: This guide details the mapping for the ReceiptRequest cXML document. It explains that a negative quantity in a receipt with receiptType="Received" is mapped to a correction status, distinguishing it from a standard receipt or a return. The logic is designed to handle receipt cancellations from the ERP system. (Search for this guide on the SAP Help Portal for the relevant version of SAP Ariba Cloud Integration Gateway).