LISTERINE® Wash Your Mouth Sweepstakes

Frequently Asked Questions

While the Official Rules outline the complete details of this promotion, your question may already be answered below.

How do I enter?
Make a qualifying purchase of a LISTERINE® product in store at Walmart or online at Walmart.com starting October 8, 2025. Be sure to keep your receipt. Then, before November 7, 2025, visit https://www.listerinewashyourmouth.com/ and follow the directions to upload an image of your receipt to the Website.

Please note, entries are awarded per receipt. If you submit a receipt which includes more than one (1) Qualifying Product, that receipt will still only count as one (1) Entry.

To enter without making a purchase, print your name, address, and email address on a piece of paper and mail it in an envelope with proper postage to "Listerine® Wash Your Mouth™ Sweepstakes," c/o Merkle Inc., P.O. Box 5025, Kalamazoo, MI 49003-5025, Department 867457. You will receive one (1) entry into the Sweepstakes, subject to the limit below. Limit: One (1) entry per stamped, outer envelope. All mail-in entries must be postmarked by November 7, 2025, and received by November 14, 2025. All entries become the exclusive property of Sponsor, and none will be acknowledged or returned. Proof of sending or submission will not be deemed to be proof of receipt by Sponsor. Released Parties (as defined below) are not responsible for lost, late, incomplete, invalid, unintelligible, illegible, misdirected or postage-due entries, which will be disqualified.
Will a credit card receipt be accepted as a purchase receipt?
Sorry, unfortunately we cannot accept a credit card receipt as it will not have enough detail to verify that the reward requirements have been met.
Did you make a purchase online?
Follow these additional steps to obtain an image of your receipt from an online purchase:
  1. Log into your online account on the retailer's app or website
  2. View your order/purchase history
  3. Select the specific order, screenshot or save a copy of your receipt, and submit
Please ensure your receipt includes all requirements listed in the Official Rules.
How many times can I enter the promotion?
You may earn up to five (5) total sweepstakes entries regardless of the method of entry.
For Fraud Prevention, what is the review process?
Our security team reviews all suspicious receipts. Any fraudulent submissions or use of fictitious names, multiple addresses, or PO Boxes to obtain additional rewards or rebates will be disqualified and may violate federal or state laws.
What are the prizes?
One (1) Grand Prize Trip to London:
  • Airfare for 2 to London
  • 4 nights hotel accommodations
  • 2 tickets to a show in the West End starring Cynthia Erivo
  • $1,000 spending money
Second Prize Bundle (10 available)
  • 1 LISTERINE® 500mL bottle and 1 LISTERINE® travel-size bottle
  • 1 Cynthia Erivo book
  • 1 Cynthia Erivo t-shirt
  • 1 $50 prepaid card*
  • 1 Cynthia Erivo poster
Third Prize Bundle (90 available)
  • 1 LISTERINE® 500mL bottle and 1 LISTERINE® travel size bottle
  • 1 Cynthia Erivo book
  • 1 Cynthia Erivo poster
Limit one (1) prize per person.

* Your use of the prepaid card is governed by the Cardholder Agreement, and some fees may apply. This is not a gift card. Please note that prepaid cards are subject to expiration, so pay close attention to the expiration date of the card
How will I know if I'm a winner?
The drawings will be held on or around November 21, 2025. The winners will be notified via email from the contact information provided upon registration. Once the winners are confirmed and prizes are fulfilled, an official win list will be posted.

A direct link to this list can be found in the Official Rules.
I think I'm having technical issues. What should I do?
Sometimes it's a simple thing like updating your browser. Check to be sure that you have a modern version of Chrome, Microsoft Edge, Firefox, or Safari. Also, you may want to check your browser preferences section to be sure JavaScript is enabled. Clearing your cache and cookies also helps in this instance.
I have recently moved or updated my email address. Can I change my registration information for this promotion?
We apologize for any inconvenience, but due to the number of entries we receive in each promotion, we are unable to change registration information. If you do win a prize during the promotional period and your contact information does change, contact customercare@helloworldfulfillment.com and provide your updated information.

Please Note: We cannot guarantee that we will be able to accommodate your request.
Why can't I use my P.O. Box address to register or claim my prize?
Your home address allows us to identify your residence for eligibility purposes.