Offline mode
When the venue's connectivity dies, scanning continues — a pre-synced manifest, queued scans with safe sync, and honest conflict reporting.
Basements, fields, and overloaded venue Wi-Fi all fail at the worst moment. The check-in console is built to keep working: it pre-downloads the event's tickets and keeps scanning with no connection, then reconciles when the network returns.
How it works
The manifest syncs ahead of time
While online, the console downloads the event's manifest — every ticket and order it might meet at the door. From that moment it can validate codes entirely locally.
Offline, scans queue
Verdicts keep appearing exactly as usual; each admit is stamped and queued on the device. The crew doesn't change anything about how they work — the console just shows it's offline.
Back online, the queue syncs
Queued scans upload in batches. Each carries a device-generated ID, so a flaky connection that retries the upload can never double-count anyone.
Conflicts are reported, not hidden
If two offline doors admitted the same ticket, the sync reports the conflict with both timestamps — you learn it happened and when, instead of the system quietly picking a winner.
The honest limits
Offline validation covers what the manifest can know:
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Rotating QR codes depend on which mode you run. Rotating (offline) still works at a disconnected door: the manifest ships each ticket's sealed one-time-code secret, and the scanner regenerates and verifies the rolling code locally, with no connection. Rotating (online) does not — its codes are checked server-side, so a disconnected door can't confirm them; connectivity is part of that mode's deal, and the fallback is verifying guests by name against the guest list. See rotating delivery.
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Orders paid while you're offline aren't in your manifest — a buyer flashing a fresh confirmation needs a manifest refresh (or the guest list) once anything is online again.
Cross-door duplicate protection is also weaker while disconnected — each offline door knows only its own history. For the rare high-security event, prefer wired connectivity or machine gates with their own uplink.