Can a student use someone else's QR code to fraudulently check themselves in?

Sharing ID cards is a discipline issue that QR attendance does not fully prevent — if a student passes their card to a classmate, the classmate can scan it. However, RedeemOS generates QR codes that cannot be easily duplicated or forged. Schools deploying QR attendance typically combine it with visual spot-checks by the duty teacher, particularly for older students.

What device is needed to scan QR codes at the school gate?

Any modern smartphone or tablet camera can scan RedeemOS QR codes using the RedeemOS scan mode in the mobile browser or app. No dedicated hardware is required for basic deployments. Schools wanting a faster, hands-free experience can use a dedicated USB or Bluetooth QR reader connected to a tablet or computer at the attendance station.

How are the QR code ID cards printed?

RedeemOS includes an ID card designer that generates printable ID card layouts for each student, including their photo, name, class, and unique QR code. Cards are printed on a standard ID card printer (PVC card printer) or on card-weight paper using a colour laser printer. Most schools process a full year's ID cards at the start of the academic year.

What happens if a student loses their QR code ID card?

When a student reports a lost ID card, the administrator invalidates the old QR code in RedeemOS and generates a new unique code for the student. The old code is immediately rejected by the scanner even if the physical card is found. The student receives a replacement card with the new QR code.

Can QR attendance work for staff check-in as well as students?

Yes. Staff QR code ID cards can be generated from the HR module. Staff scan their card at the beginning and end of each working day, creating a digital time-and-attendance record. These records feed into the HR module's attendance data, providing an automatic daily attendance log for payroll and leave management purposes.

Attendance

QR Code Attendance Integration for Schools

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Overview

QR code attendance integration allows students and staff to check in using a QR-code-printed ID card or wristband, scanned by a smartphone camera or a dedicated QR reader at the classroom door or school gate. Each student's unique QR code is generated by RedeemOS and printed on their school ID card. When scanned, the QR code transmits the student's identity to RedeemOS and creates an attendance record in real time. QR attendance is faster to set up than biometric systems (no biometric enrolment required), works reliably for all age groups including young children, and costs significantly less per installation. It is the preferred contactless attendance method for primary and junior high schools transitioning from manual roll call.

How It Works

1
RedeemOS generates a unique QR code for each enrolled student. The QR code encodes the student's unique system ID and a cryptographic token that prevents forgery.
2
The QR codes are included in the student ID card layout within RedeemOS's ID card designer module and can be printed in bulk on standard ID card printers.
3
A smartphone with the RedeemOS scanning app, or a dedicated USB QR reader, is placed at the classroom entrance or school gate attendance station.
4
As students arrive, they hold their ID card up to the camera or reader. The QR code is scanned in under a second and the student's identity is confirmed.
5
RedeemOS creates the attendance record for the scanned student at the time of scanning. Students who have not scanned by the roll call deadline are automatically marked absent.
6
The class teacher or duty teacher can see the live scan log on their device, allowing them to confirm who has arrived and follow up with unscanned students.

Benefits

No biometric enrolment required — ID cards with QR codes can be issued to students in days

Works reliably for all age groups including very young children who may have difficulty with fingerprint readers

Cost-effective setup using a standard smartphone camera rather than dedicated biometric hardware

Cryptographically secure QR codes prevent students from sharing cards or creating fake IDs

Faster check-in throughput at the school gate during peak morning arrival periods

ID cards serve dual purpose — school identification and attendance capture — reducing administrative overhead

Frequently Asked Questions

Related Features

School Attendance Tracking Software

Student Information System

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