--- title: "Offline event check-in and device sync | Talli" description: "Keep checking people in without signal. Scans are saved on the device, sync on their own when the connection is back, and each ticket still counts only once." url: https://www.tallievents.com/features/offline-check-in updated: 2026-11-06 site: "Talli" --- Offline check-in # Keep checking people in without signal. Phones and laptops save the event's check-in list, so the door keeps moving when the connection drops. Every scan is saved on the device the moment it happens and syncs on its own when the signal is back, and organizers see every device and what it is still holding. [Request a demo](https://www.tallievents.com/#request-demo) [Sign in](https://app.tallievents.com/sign-in) ![Without signal: a banner says Offline - 2 check-ins will sync, and a Welcome! card for Anh Nguyen is marked Will sync.](https://www.tallievents.com/api/media/7278fb30-c7f7-4726-869c-d89196bf27a4/talli-iphone-offline-scan-framed.webp) ![The Recent tab with a green All synced banner and the time.](https://www.tallievents.com/api/media/2eba932d-5a7d-417f-aa2a-79213a9c0983/talli-iphone-recent-synced-framed.webp) A scan without signal, and the Recent tab once everything has synced. Shown with sample data. ## What happens when the signal drops at the door Common problems with check-in at busy or remote venues, and how Talli handles each one. ### The connection fails just as people arrive Open check-in while there is still a connection and the device saves the event's check-in list. In the iPhone app the home screen says Ready offline, and from then on the phone can check people in, and search by name, with no signal. ![After sign-in: the event Beat the Heat - Albany marked Ready offline, and a choice of where you are standing: Main entrance or a session room.](https://www.tallievents.com/api/media/d7ebc77c-c076-4886-930d-aab2883fc40b/talli-iphone-event-home-framed.webp) ![The scan screen at Main entrance: a camera viewfinder, 43 of 118 checked in, and a Type a ticket code button.](https://www.tallievents.com/api/media/fd257cee-7445-473a-a9b6-16ecda1e057c/talli-iphone-scan-ready-framed.webp) Ready offline after sign-in, then the scan screen at Main entrance. Shown with sample data. ### Two phones scan the same ticket offline Each scan is sent once, however many times the device retries. If the same ticket is scanned on two devices without signal, the first scan to reach Talli checks the person in, and the other shows as already checked in. ![An amber Already checked in card for the same ticket, saying when, where and by whom, tagged Not counted twice.](https://www.tallievents.com/api/media/e920c023-cb0c-4200-8b3b-842f5ee9bb6c/talli-iphone-already-in-framed.webp) The same ticket scanned again. Shown with sample data. ### Nobody knows which phone is still holding scans Devices and sync lists every phone, tablet and laptop at the event with its entry point, who is signed in, its app version, its last sync and the scans waiting on it. A lost or stolen device can be signed out remotely, and Talli then refuses it for good. ![The Devices and sync page: devices online, scans waiting to sync, scans today and devices needing an update, a list of devices with their user, app version, last sync and status, and an offline Side door iPhone open with Rename, Change entry point, Lock to check-in and Sign out remotely.](https://www.tallievents.com/api/media/205cac5c-33d2-4fc9-b61a-954143907dae/talli-devices-sync.webp) The Devices and sync page with one offline phone open. Shown with sample data. ### Scans get lost on a shared device Signing out first sends any scans still saved. If some cannot be sent, Talli says how many and lets you stay signed in or keep them for the next sign-in. Closing the app or restarting the phone never loses a scan. ### Staff see more than they need Under Staff assignments, give each staff member the whole event or one entry point. They then see only those events and entry points, on check-in, in the phone app and in reports. ## How it works Get the list onto each device while you still have a connection, then scan as usual. ### Open check-in with a connection Open Check-in for the event, or choose the event in the iPhone app. The device saves the list and says how many people are on it. ### Keep scanning offline When the connection drops, a bar says Offline and how many scans are waiting, for example Offline - 3 scans waiting. ### Let it sync When the connection is back, waiting scans are sent on their own, in the order they were made, and Talli checks each one again. ### Review from the office Owners and admins open Devices and sync to see each device's status, and the Scan log tab to filter scans by result or entry point. **Read the guide.** How the saved list works, clean sign-outs on shared devices, device statuses, remote sign-out, staff assignments and the scan log. [Read the offline check-in guide](https://www.tallievents.com/docs/devices-and-offline) ## Related features ### Check-in Scan tickets from any phone browser or the iPhone app, find people by name, and count every ticket once. [See check-in](https://www.tallievents.com/features/check-in) ### Dashboard and reports Watch arrivals live on event day, see the whole organization at a glance, and report on attendance, audiences and credits. [See dashboard and reports](https://www.tallievents.com/features/dashboard-and-reports) ### Brand portal Exhibitors sign in with a link, scan booth visitors, write their booth page and follow up on leads who agreed to share. [See brand portal](https://www.tallievents.com/features/brand-portal) ## Frequently asked questions ### What is stored on the device for offline check-in? Names, ticket codes, attendee types, languages and check-in times. No emails, phone numbers or registration answers are kept on the device, and signing out always deletes the saved lists. ### How do I know a scan made offline was counted? The result card says Will sync, and a banner shows how many check-ins are waiting. Once they are sent the banner says All synced, and the Recent tab in the iPhone app shows where each scan stands. ### What if a scan cannot sync? It is never dropped quietly. In the iPhone app it shows as Couldn't sync, for example when the ticket was cancelled while the phone was offline, and Review lists only those scans with Try sending again. ### What should I do about a lost phone? Open Devices and sync, choose the device and choose Sign out remotely. The person on it is signed out at once and Talli refuses the device for good, so check people in on another device. ### Does the live count include offline scans? Scans waiting on a device are added to the count once they sync. Devices and sync shows how many scans are waiting and on how many devices. ## Run the door at any venue See offline check-in and device sync on your own event. [Request a demo](https://www.tallievents.com/#request-demo) [Sign in](https://app.tallievents.com/sign-in)