KSEF-002:Invoice date too old for KSeF
Invoice issue date cannot be more than 30 days before KSeF submission date. Older invoices will be rejected by the system.
Engine Classification
Financial or legal field · Modification blocked by policy
Reason: KSeF rejects invoices with issue dates more than 30 days before submission. The invoice date cannot be changed retroactively. Issue a new invoice with a current date, or submit through alternative channels if KSeF deadline has passed.
What is KSEF-002?
KSEF-002 is a fatal validation rule defined in the KSeF specification (POL national rules). It checks whether invoice date too old for ksef.
When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.
Why This Error Matters
KSEF-002 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: KSEF-002
- ·Specification: KSeF
How to Fix It
Technical Reference
Common Causes
- ·Invoice created but not submitted in time
- ·Backlog of invoices
- ·System date misconfiguration
Seeing this in production? The API handles KSEF-002 automatically. See the fix response →
Frequently Asked Questions
Invoice issue date cannot be more than 30 days before KSeF submission date. Older invoices will be rejected by the system.
Submit invoices within the 30-day window. This error involves a protected field — Invoice Navigator flags it in your pipeline so your team can correct it at the source.
Yes, KSEF-002 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
KSEF-002 involves a financial or legal field that cannot be auto-modified by policy. Invoice Navigator detects and flags this error immediately, but the correction must be made manually in your ERP or invoicing software.
Related Content
Last updated: 3 March 2026
Detect KSEF-002 Before Submission
This error involves a financial or legal field that cannot be auto-modified. The compliance engine flags it immediately with a clear diagnosis so your team can fix it at the source.