Emergency Mode vs offline24 in KSeF — Which One Saves You When
You switch on offline24 yourself, whenever you want — no internet, KSeF running slow, or simply by choice. You must submit the invoice to KSeF by the next business day at the latest. Emergency mode kicks in only when the Ministry of Finance officially announces a KSeF outage in the Public Information Bulletin (BIP) and interface software. Then you get 7 business days from the end of the outage. Both modes require a KSeF type 2 certificate and two QR codes on the invoice. What sets them apart is mainly who triggers them and how long you have to submit.