How to Check for Duplication of Invoice Entry

June 30, 2009 by mySAP
Filed under: SAP Tutorial

Select the “Chk double inv” indicator. (check for duplicate invoice) on the Payments in Accounting screen in the vendor master through FK02 transaction.

The SAP system only checks for duplicate invoices in Logistics Invoice Verification if you enter the reference document number when entering the SAP invoice.

In the Implementation Guide (IMG) for Logistics Invoice Verification, you can define that the following characteristics are not checked:

Logistics Invoice Verification > Incoming Invoice > Set Check for Duplicate Invoices

Reference document number
Invoice date
Company code

The result of this is that the SAP system is more likely to find a duplicate invoice, as it checks fewer characteristics.

Note: that if you deselect the Company Code field this can have a negative effect on system performance. This is because the system then checks numerous documents from existing company codes.

In the vendor master, set whether the SAP system should check for duplicate invoices.

The check for duplication of invoice entry aims to avoid invoices being accidentally created and paid twice.

When you enter invoices, the SAP system first checks whether the accounting documents in SAP Financial Accounting and then documents in Logistics Invoice Verification – only those that contain errors or that were entered for verification in the background – the following fields must be identical for Duplicate invoice checking.

Vendor
Currency
Company code
Gross invoice amount
Reference document number
Invoice doc. date

The SAP system only checks invoices. It does not check credit memos or subsequent credits/debits. When you create a duplicate invoice, the SAP system displays a warning or error message, depending on your settings in Customizing.