Validation methods compared

Mark as Used vs QR code scanning: which should you use?

Two ways to validate single-use vouchers in store. Both prevent reuse and track every redemption. The difference is how your staff interact with the coupon.

Try a demo voucher Learn about in-store promotions
✓ VALID
20% Off Your Order
Valid for 7 more days
Mark as Used
Tap to redeem this offer
Mark as Used
✓ SCANNED
20% Off Your Order
Scanned · Redeemed
Accepted
This code has been marked as used and cannot be redeemed again.
QR scanning

How it works

What happens when a voucher is validated.

Both methods follow the same three-step process. The only difference is who triggers it.

  1. 1
    Confirmed legitimate
    The system checks the code exists and belongs to a real campaign.
  2. 2
    Checked for prior use
    Has this code been redeemed before? If so, it’s rejected.
  3. 3
    Marked as redeemed
    The code is locked. The voucher shows as used, and a repeat scan shows “Already redeemed.”

Your two options

Pick the workflow that fits your team.

Mark as Used

Staff taps on customer’s phone

  • No hardware needed
  • One tap changes the status instantly
  • Show someone once and they’ve got it
  • Best for: simple campaigns, small teams, single locations

The customer shows their voucher on screen and staff tap the button. The code is locked and the redemption is logged.

QR code scanning

Staff scans from their own device

  • Uses the phone camera, with no app to download
  • Validates and locks in one scan
  • The system decides, so staff don’t make judgment calls
  • Best for: multiple locations, high volume, events

Staff open the scanner page on their phone and point the camera at the customer’s QR code. The system validates and redeems in one step.

Side by side

Quick reference table.

FeatureMark as UsedQR scanning
SetupVery easyModerate
HardwareNonePhone with camera
Staff trainingMinimalShort session
SpeedFastFast
Control levelMedium (staff tap)High (system-driven)
Who triggersStaff on customer’s phoneStaff from own device
Best forSimple campaigns, small teamsScaled operations, multiple locations

Not sure? Start with Mark as Used.

Add QR scanning if volume grows. You can switch without changing your codes.

Go deeper

Want the full breakdown?

This page gives you the short version. The full guide covers setup, common mistakes, and when to switch between methods.

Read the full guide: Mark as Used vs QR code scanning

Use cases

Use Mark as Used or scanning in real campaigns

The right method depends on where the voucher is redeemed and how much control staff need.

Coupon validation system

Give staff a clear answer on whether a voucher can be redeemed.

Explore coupon validation

In-store coupon redemption

Validate offers at checkout without changing the POS.

Explore in-store redemption

Restaurant voucher system

Keep free item and bounce-back offers simple for staff.

Explore restaurant vouchers

Event voucher system

Scan perks, drink tickets, and booth offers in busy lines.

Explore event vouchers

Keep exploring

Where to go next

In-store promotion system → QR scanning system → Restaurant use cases →

Try Mark as Used yourself.

Try a demo voucher, mark it as used, then open it again to see the used status. These examples use Mark as Used; scanner setup is separate.

Start free trial Try a demo voucher

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