Can a single QR code be used twice?

No. On the first scan, the ticket is marked as used. A repeated scan will show a warning with the time of the first entry. This protects against transferring the ticket to another person.

What if a participant does not have their QR code with them?

Find the participant by name or email in the participant list through the tikento app and perform a manual check-in.

Does QR code scanning work offline?

Yes. The tikento app works offline — ticket data is loaded during the last sync. Check-in results are saved locally and synchronized when the network becomes available.

QR Code Ticket: Generation and Verification

How the QR code is generated

When a participant completes registration and their status transitions to registered, the system automatically creates a ticket instance (TicketInstance) with a unique QR code.

The QR code contains an encrypted ticket identifier. The code is unique to each ticket and cannot be forged or guessed.

When the QR code becomes available

Free event — immediately after registration
Paid event — after payment confirmation
With moderation — after organizer approval (and payment, if the event is paid)

Until the QR code is generated, the participant sees a message about the current status of their registration.

Where the participant finds their QR code

The participant receives the QR code in several ways:

Email — the confirmation email includes the QR code and a link to the PDF ticket
Personal account — in the "My Tickets" section on the tikento website
Telegram — if the participant registered through the Mini App, the QR code is available in the bot chat

PDF ticket

The participant can download a PDF version of the ticket from the confirmation email or from their personal account. The PDF contains:

QR code for entrance
Event name
Date, time, and venue
Ticket type and selected options
Participant name

On Pro and higher plans, the organizer can customize the PDF ticket design: add a logo, change colors, and include additional information.

Entrance verification (check-in)

Scanning the QR code

Open the tikento app on your phone.
Go to the event -> "Check-in" (or click the scanner button in the participant list).
Point the camera at the participant's QR code.
The system will show the result:
- Green — the ticket is valid, the participant is checked in
- Red — the ticket has already been used, is invalid, or not found

On a successful scan, the screen displays the participant's name, ticket type, and selected options. This helps the entrance team quickly identify the participant.

Duplicate scan protection

Each QR code can only be scanned once. On a repeated scan, the system shows:

A warning that the ticket has already been used
The time of the first check-in
The name of the participant the ticket belongs to

This prevents sharing the QR code with others after entry.

Manual check-in

If the participant cannot present a QR code (forgot their phone, battery died), the organizer performs the check manually:

Open the participant list in the app.
Find the participant by name or email.
Click "Mark entry" on their card.

QR code verification works without internet. During the last sync, the app downloads the current ticket list into the local database. Scan results are saved locally and sent to the server when the network becomes available.

Learn more about offline check-in — Check-in via QR Code.

Cancellation and refund

When a registration is cancelled or a payment is refunded, the QR code is automatically deactivated. If a participant tries to enter with a voided ticket, the system will show an appropriate warning during scanning.