What must you do to correct a receipt that was over-received in SAP Ariba Buying and Invoicing?

To address an over-received receipt in SAP Ariba Buying and Invoicing, entering a negative value in the Accepted box is the appropriate action. This method effectively adjusts the quantity that has been recorded as accepted to reflect the actual amount received, thus correcting the over-receipt without creating additional documents or complications. This functionality allows for precise adjustments within the existing receipt document and is essential for maintaining accurate records in procurement processes.

Other options would not effectively rectify the over-receipt situation. Simply contacting a system administrator may delay the resolution and doesn't empower users to manage their own receipts effectively. Creating a new receipt document could lead to inconsistencies and complicate the record-keeping process rather than directly addressing the error. Deleting the original receipt could result in loss of important transaction history and might not be permissible, depending on the organization's policies and the software's settings. Therefore, adjusting the quantity with a negative value is the most logical and efficient approach to resolving the issue.