When KSeF is unavailable
The National e-Invoicing System can be temporarily unavailable — both for planned reasons (maintenance) and due to outages. The VAT Act (Art. 106nh) provides for an offline mode for such cases: the ability to issue an invoice outside the system and send it to KSeF once the cause of the unavailability has passed.
How Atestio responds to KSeF being unavailable
Section titled “How Atestio responds to KSeF being unavailable”When submitting an invoice runs into a temporary system outage, Atestio automatically retries the submission — no extra action is needed on your part. The document stays visible with a status indicating the submission is in progress, until KSeF accepts it.
If the outage drags on, please contact us — pomoc@atestio.pl.
The dashboard clearly shows when Atestio doesn’t have an active connection to KSeF:
Do you need to apply the offline-mode procedures yourself?
Section titled “Do you need to apply the offline-mode procedures yourself?”The statutory offline mode covers situations where the taxpayer knowingly issues an invoice outside the KSeF system for the duration of its unavailability. Atestio reports the system’s unavailability in error messages, but the decision to apply the offline-mode procedures — including the timing and method of later submitting the document to KSeF — is made by the taxpayer under Art. 106nh of the VAT Act.
What’s next
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