One Reverse entry a booking correction type in SAP Business One, which is marked in the DATEV export with the General Reversal Key (GU Key). Up to VFS v03, every reversal posting was exported blanketly with the General Reversal Key 20 – regardless of whether it was a credit note or a cancellation document.
Context
From VFS v04.2026, the user controls the GU key assignment via three modes: account-based (only specific accounts receive the key), cancellation-based (only explicit SAP B1 cancellation processes receive the key), or document-based (all reversal postings receive it). This differentiation prevents credit memos from being incorrectly exported as general reversals — which previously led to an incorrect debit representation in DATEV. (Source: V04.2026_V2, Ch. 4.1.3, p. 11)
Demarcation
A reversing entry is not the same as a credit note. A credit note is a standalone document type that reduces revenue; a reversing entry corrects a booking error by offsetting it. Both may take the same technical booking path in the system, but they must be marked differently in the DATEV export so that the firm can process the situation correctly.
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