Single-use car wash vouchers

Car wash offers that can't be reused.

Run free wash and upgrade promotions without worrying about repeat use. A shared or screenshotted voucher still only works once. Staff check vouchers at the lane, or your pay station accepts codes you import. No POS integration required.

Try a demo voucher See how redemption works
✓ VALID OFFER
Free Premium Wash
Valid for 7 more days
Mark as Used
You'll be asked to confirm. Once used,
this offer cannot be redeemed again.
Offer redeemed
This offer was marked as used just now.

The real-world problem

Free wash promotions are easy to abuse.

If you offer free washes, upgrades, or introductory discounts, reuse will happen.

Coupon Carrier covers in-store voucher redemption without POS integration. At staffed lanes, an attendant validates the offer and applies the wash or upgrade as usual. At unattended sites, you import codes from your wash system so the pay station accepts each customer's unique code.

Customers reuse screenshots

“One-time” wash offers get screenshotted, forwarded, and redeemed again and again, and you have no way to tell.

Staff can't verify during a rush

Is this offer valid? Has it been used? There's no answer while the queue backs up.

POS can't enforce single use

Most car wash POS systems have no concept of one-time digital vouchers. Integrations take months and cost more.

No record of what was redeemed

You can't reconcile campaign cost against actual unique redemptions. There's no audit trail.

How it works

From offer to redemption in five steps.

Create wash offer
Import or auto-generate codes
Share anywhere
Email, ads, or signage
Customer arrives
Shows voucher on their phone
Marked as used
One tap, instant status change
Reuse blocked
A used code can't be redeemed again
Try a demo voucher See the full redemption flow →

See all integrations → · Send vouchers by SMS with Zapier →

What you get

Built for real-world car wash redemption.

Single-use enforcement

Each voucher can only be redeemed once. If someone tries again, the voucher shows as used and a repeat scan is rejected.

Tap or scan to redeem

Staff tap “Mark as Used” on the customer's phone, or scan the QR code. Both need an attendant or cashier to check the voucher.

Learn how QR scanning works →

Attended or unattended

At staffed lanes, attendants check vouchers from any phone with a browser. At unattended sites, import codes from your wash system: each customer gets one unique code, and the pay station accepts it.

No POS changes required

It doesn't touch your POS, so there's no integration project and no hardware to buy. You can launch a campaign without waiting on IT.

Full audit trail

Every redemption is recorded with the time and the scanner login that redeemed it. Filter by campaign, tag, or date. Export CSV reports.

Learn how mark-as-used works →

Time-limited offers

Set expiry windows from hours to weeks. Codes expire on their own, so old offers stop working without any cleanup on your end.

Common car wash promotions

Campaigns car washes actually run.

Also works for: Restaurants & retail · Bars & breweries · Entertainment venues

Common questions

Frequently asked

Can this work at unattended car washes?
Yes, using codes from your wash system. Import the codes your pay station already accepts, and Coupon Carrier gives each customer one unique code to enter at the pay station. Coupon Carrier isn't connected to your wash equipment or pay station, so redemption tracking for those codes lives in your wash system. Mark as Used and the QR scanner need someone to check the voucher, so they fit sites with an attendant or cashier.
Does this require a kiosk or POS integration?
No. Coupon Carrier runs in the browser and isn't connected to your kiosk, pay station, or POS. There's nothing to install. At staffed sites, you create offers in our dashboard, distribute them, and track redemptions there. At unattended sites, you import codes your pay station already accepts, and your wash system tracks the redemptions.
What happens if someone tries to reuse the voucher?
The voucher page shows it's already been used, with the date and time it was redeemed, and there's no button left to tap. If staff scan it again, the scanner shows “Already redeemed.” Anyone looking at the customer's phone can see the status at a glance.
Can we track redemptions per location?
Yes. Create a scanner login per location or staff member, and reports show which scanner login redeemed each voucher. You can also use tags to separate campaigns by location. Export CSV reports for reconciliation or analysis.
How do we get started?
It's self-serve. Create an account, set up your first offer, import or auto-generate codes, and share the link. You don't need an onboarding call, an integration project, or any hardware to get started.

Stop free wash abuse before it starts.

Test the redemption flow yourself. Watch a single-use voucher go from valid to used and stay used.

Start free trial Try a demo voucher

7-day free trial · 30-day money-back guarantee · See pricing · Guided demo