Troubleshooting

An invoice has the status “rejected” — what now?

The rejection reason returned by KSeF can be checked by opening the invoice; after correcting the fields it points to, resend the document.

KSeF is unavailable or returns a connection error

Temporary outages on the KSeF side can happen — Atestio automatically retries the submission. If the problem persists, please contact us — see also When KSeF is unavailable.

Errors when connecting with a token

“Could not verify with KSeF” — the token may have expired or been revoked in the KSeF Portal. Generate a new token and enter it again.

“Verification failed” — check that the token was pasted in full, with no spaces at the start or end.

Errors when connecting with a certificate

“Upload the certificate and verify it in KSeF” — the certificate was uploaded but hasn’t been verified yet; select Verify next to the credential’s row.

“The verified certificate doesn’t contain the entity’s NIP” — the certificate doesn’t carry data identifying the taxpayer; upload the certificate again, checking that it’s for the right NIP.

“An authentication certificate is required” — a certificate marked as offline-mode isn’t used for signing in to KSeF; a separate certificate with the authentication role is needed — see Ways to connect to KSeF.

Errors when connecting with Profil Zaufany

“NIP must have exactly 10 digits” — check that the NIP was entered without hyphens or spaces.

“Couldn’t start the Profil Zaufany session” — try again shortly; if the problem repeats, check that Profil Zaufany itself is working, directly on the gov.pl site.

The browser blocked a new tab — Profil Zaufany opens in a new tab; allow pop-ups for Atestio in your browser and try again.

Recovering your password

To receive a password-reset link, use the “I don’t remember my password” option on the sign-in screen.

Couldn’t find an answer?

You can reach us at pomoc@atestio.pl — we reply on business days.