KSeF emergency mode vs offline24 — the difference and when each saves you
offline24 and emergency mode look almost identical on the invoice itself — an invoice issued outside the system, the FA(3) structure, two QR codes — but one thing separates them: whose problem it is. You use offline24 when your own internet or software fails, and you get until the next business day to send it to KSeF. Emergency mode only kicks in once the Ministry of Finance officially declares a KSeF outage — and then you get a full 7 business days from when it ends. Below I explain how not to confuse the two, and what to do when one turns into the other.