Troubleshooting
Fix errors and recover from failures without waiting for support.
Common fiscalisation errors and how to fix themA quick index of the errors you'll actually see, and the one-line fix for each.
"Sequence not unique" and signature errorsThe device's counter or hash chain fell out of step — let PI Fiscal re-align and resubmit the pending document.
Power cuts, poor network and offline salesYou can keep trading — documents are signed and queued, then submitted automatically with no gaps or duplicates.
Fiscal day close (Z-report) failed — what to doUsually a connectivity blip during submission; retry the close once the link is back.
Device pairing issues ("already registered")The serial or device was partly registered before — clear the state or use a fresh key, then re-pair.