Challenge Coin Check
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The Gray Water Ops Smart CoinĀ® is an exclusive product protected by utility patent US 9,027,841 B2. If you find another company offering NFC embedded custom coins please let us know!
Legal
Return & Refund Policy
We will replace any damaged products. All sales are final. Due to the custom nature of our products, refunds are not accepted. If we ship a product in error, contact us and we will correct it and get the right product out to you.
Payments accepted
American Express, Mastercard, Visa, Discover. Businesses and local, state, or federal government agencies can pay via check or ACH.
Ā© 2026 Gray Water Ops. All rights reserved.
Smart CoinĀ® Ā· U.S. Patent 9,027,841 B2 Ā· in force through 2033
