Most event badge problems come from a sync that stopped early, an attendee list that doesn’t follow the attendee spreadsheet, or an invitation opened on the wrong device. Find your problem below.

## The badges don’t sync

Keep the Event Badges app open during the whole sync, with Bluetooth on and the badges close to your phone or tablet.

If only one or a few badges don’t sync, assign those attendees a different badge:

1. Go to **All attendees**.
2. Select the attendee whose badge didn’t sync.
3. Click **Replace badge** at the top of the screen.

## Details are missing or wrong on a badge

### On only a few badges

Fix them by hand:

1. Go to **All attendees**.
2. Edit the attendee.
3. Update their badge again.

### On all badges

The attendee list probably doesn’t follow the format of the attendee spreadsheet. Delete the event and start again:

1. Open the event.
2. Click **Menu** in the top-right corner.
3. Click **Event settings**.
4. Scroll to the bottom of the screen and click **Delete event**.
5. Create the event again, and import a list that uses the format of the attendee spreadsheet: the same columns, in the same order.

See [Create an event and import your attendees](/help/event-badges/create-an-event-and-import-attendees).

## The app won’t install

Open the invitation email on your phone or tablet, not on a computer. Install App Tester before the Event Badges app. See [Install the Event Badges app (test version)](/help/event-badges/install-the-event-badges-app).

## Still stuck?

Our support team can walk you through the setup step by step. [Contact Joan support](/help/contact).

## Related articles

- [Get started with Joan event badges](/help/event-badges/get-started-with-event-badges)
- [Sync event badges](/help/event-badges/sync-event-badges)