KSEF-BUS-198 HEURISTIC Warning KSeF Guard Only
Invoice created during night hours
Faktura utworzona w godzinach nocnych
Problem
The invoice creation timestamp (DataWytworzeniaFa) falls within night hours (22:00-05:59). Night-hour creation is rare and may indicate a system error or automated process.
How to Fix
Check the invoice creation hour — invoices are typically generated during business hours. If the hour is correct, this may be justified by a special business process (e.g. cross-time-zone operations).
Source Reference
KSeF Guard heuristic (22:00-05:59 night-window invoice creation — gateway validation practice)
Source Quote
“Invoice created during night hours (22:00-05:59) may indicate a system error or automated process requiring verification.”
Description
SHA-256: 356b280d8820…
Justification
BUSINESS LOGICLegal Basis Chain
1
KSeF Guard heuristic — night hours
KSeF Guard heurystyka — godziny nocne
“[KSeF Guard heuristic] BUS-198 has no direct basis in the VAT Act — the Act does not regulate the technical creation hour of an invoice file. The rule is an operational heuristic that enforces the practical pattern of generating invoices during business hours. Night-hour creation (22:00-05:59 server/taxpayer time) often signals a clock error, an uncontrolled batch process, or activity requiring verification.”
KSeF Guard heuristic (business-hours creation pattern)