QR code redemption system
Staff scan a QR code with their phone camera. A valid code is redeemed on the spot, and the scanner shows “Accepted,” “Already redeemed,” or “Invalid code” right away. There’s no app to download and no hardware to buy.
Why unique codes matter
If everyone gets the same code, anyone can screenshot it, drop it in a group chat, and use it over and over. Your staff can't stop it.
Coupon Carrier generates a unique QR code for every recipient. Each one can only be scanned and redeemed once. That’s what makes in-store promotions actually trackable. For a walkthrough of what happens at the counter, see how to redeem QR code coupons in-store.
What staff see after scanning
Staff scan the code and get a clear answer right away.
Redeemed on scan
The code was valid, so the scan redeemed it right away. There’s no extra button to tap. Staff just apply the offer.
Scanned a second time
Someone already used this code. Could be a screenshot, a forwarded link, or a second attempt.
No matching voucher
The scanned code doesn’t match a valid voucher, so it can’t be redeemed. Staff don’t need to do anything else.
Zero hardware required
Coupon verification runs in a web browser. If your staff have a phone with a camera, you’re set. You don’t need POS changes, an app, or a dedicated scanner.
Staff open the scanner page in their browser, on iPhone or Android. If the phone has a camera, it works.
The scanner is a web page, not an app, so there’s nothing to download or update. Open the link and scan.
You don’t need barcode guns or tablets. A phone camera is enough, so there’s nothing to buy and no IT ticket to file.
Getting codes to customers
Coupon Carrier connects to the tools you already use. Each customer gets their own unique code.
Connect Mailchimp, Klaviyo, HubSpot, or another supported email platform, or use Zapier. Codes get inserted automatically when you send a campaign.
Trigger a unique voucher when someone fills out a form. Works with embedded forms, pop-ups, or landing pages.
Export print-ready files with a unique QR code for each voucher. Use them on postcards, flyers, or packaging, each one still single-use and trackable.
You can also generate a short personal voucher link and send it yourself in WhatsApp, Instagram DMs, email, or chat. Coupon Carrier doesn’t send those messages, but it handles the voucher and redemption. How to send voucher links yourself.
Read the full guide: How to distribute QR code coupons.
For form-triggered campaigns, see Jotform instant vouchers. For automation-first in-person flows, see offline coupon redemption with Zapier.
Simpler alternative
You can also start with Mark as Used, a button on the customer’s phone. The customer shows their voucher and staff tap the button to redeem it. No scanning required.
QR scanning adds a layer of control for higher-volume locations or when you want staff to initiate the redemption. Both methods prevent reuse and track every event.
Use cases
QR validation is most useful when staff need a quick yes-or-no answer before accepting an offer in person.
Validate drink tickets, perks, entry offers, and sponsor activations from a phone scanner.
Use QR scanning as a POS-free redemption layer for retail, services, and local promotions.
Check whether a voucher is valid or already redeemed before accepting it.
Keep exploring
Common questions
Staff open the web scanner and point their phone camera at the customer’s QR code. If the code is valid, it’s redeemed right away and the scanner shows “Accepted.” A code that was already used shows “Already redeemed,” and a code the scanner doesn’t recognize shows “Invalid code.”
No. Digital coupon validation runs in a web page on any phone with a camera. You don’t need a dedicated device, a native app, or changes to your POS.
Yes. Create a scanner login per location or staff member, and each person opens the scanner page in their own browser. There’s nothing to install or sync, and reports show which scanner login redeemed each voucher.
Try a demo voucher on your phone. Mark it as used, then reopen it to check its status. These examples use Mark as Used; scanner setup is separate.
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