Terms of Service

Acceptance of Terms

By accessing or using The NFC Mint websites, products, apps, and services (the "Service"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, you may not use the Service. These are the canonical terms for all of The NFC Mint's websites, apps, and services, and the version published on this page at https://www.nfcmint.com/terms is the authoritative version.

Service Description

The NFC Mint LLC provides StampCats collectibles, OnceMark tag packs, and TamperKit seal packs. Our apps are NFC Proof, NFC Utils, OnceMark, TamperKit, and StampCats. Our cryptographic validation service verifies the authenticity of tags registered with The NFC Mint LLC through URL-based validation and mobile app scans, including scans in NFC Proof.

Product Orders and Sales

Orders for products or services are subject to availability and acceptance. We reserve the right to refuse or cancel orders at our discretion. Pricing, product specifications, and availability are subject to change without notice.

Service Availability

All products include 3 years of validation service unless otherwise specified. While we strive for maximum uptime, the Service is provided "as is" without warranties of any kind. We do not guarantee that the Service will be available at all times or that it will be error-free. We reserve the right to modify, suspend, or discontinue any aspect of the Service at any time without prior notice. Service uptime and validation server availability are not guaranteed.

Payment Terms

Payment is required prior to order fulfillment unless alternative arrangements have been made. We accept payment methods as specified during the ordering process. All prices are in United States Dollars (USD) unless otherwise stated.

Shipping and Delivery

Shipping times and costs vary based on order size, destination, and shipping method selected. We are not responsible for delays caused by shipping carriers or customs. Risk of loss passes to the buyer upon delivery to the carrier.

Returns and Refunds

Due to the security-sensitive nature of our products, returns are evaluated on a case-by-case basis. Defective products may be eligible for replacement or refund. Contact us at support@nfcmint.com to initiate a return request.

User Responsibilities

Users of the validation service are responsible for:

• Ensuring their device's NFC functionality is working correctly

• Using the Service only for legitimate authentication purposes

• Not attempting to reverse engineer, circumvent, or compromise the security of the Service

• Not using automated tools, bots, or scripts to access the Service

• Scanning tags in appropriate conditions with compatible devices

Validation Results

Validation results provided by the Service indicate whether a tag's cryptographic signature matches our records. However, validation results should not be the sole basis for purchasing decisions. Users should employ multiple verification methods when assessing authenticity.

StampCats

StampCats provides a location-based digital stamp collection service authenticated through NXP NTAG 424 DNA NFC tags. Each stamp is verified through multi-layered security including AES-CMAC cryptographic validation, factory chip authentication, GNSS location verification, and real-time abuse detection. All digital passports are publicly accessible and associated with the respective NFC tag's UID.

No Account Required
StampCats operates on a pseudo-anonymous basis. StampCats does not require account creation, login credentials, email address, Apple ID, or Google account. Your digital passport is identified exclusively by your NFC tag's unique cryptographic identifier. By using StampCats, you acknowledge that you are responsible for physical possession and security of your NFC tag.

Public Passport Data
By using StampCats, you expressly acknowledge and agree that your stamp collection, including all locations visited, dates, times, geographic coordinates, and associated metadata, will be publicly viewable via a URL associated with your tag's unique identifier. This public visibility is an intentional and fundamental feature of StampCats. Anyone with knowledge of your tag UID can view your complete passport history. Do not use StampCats if you wish to keep your travel history, location data, or stamping activity private. There is no mechanism to make your passport private after stamps have been collected.

Location Data and Verification
StampCats collects location data only when you actively choose to add a stamp and explicitly consent to location access. Location verification is performed using multiple GNSS services (including GPS, GLONASS, and other satellite positioning systems) in conjunction with platform location services (Apple Core Location on iOS and Google Play services location on Android) to verify your physical presence at a location. We employ spoof detection and jailbreak and root detection to maintain system integrity. You are responsible for the accuracy of location data. We are not responsible for incorrect location data caused by GNSS inaccuracy, atmospheric interference, device malfunction, or user error.

Cryptographic Validation
StampCats validates NFC tags using NTAG 424 DNA cryptographic signatures, including AES-CMAC validation, monotonic counter verification, factory ECC originality signatures, and validation server key verification. Validation results indicate whether a tag's cryptographic signature is authentic and whether security checks have passed. StampCats does not guarantee the safety, legality, accessibility, or appropriateness of any physical location associated with a stamp.

User-Generated Locations
Locations and stamps on individual passports constitute user-generated content. We do not create, endorse, verify, or guarantee the accuracy, safety, legality, accessibility, or appropriateness of any user-generated location. Always verify the safety and correctness of listed stampable places before traveling. You visit locations entirely at your own risk.

StampCats Responsibilities
In addition to the general responsibilities above, StampCats users must ensure their device has functional NFC capabilities and location services, must not attempt to spoof, manipulate, or falsify location data, must not jailbreak, root, or modify their device to bypass security measures, must not collect stamps through automated means, and must respect private property, follow local laws, and ensure personal safety when visiting locations.

Prohibited Uses

Our products and services are provided for legitimate authentication and verification purposes. You may not use the Service to:

• Violate any applicable laws or regulations

• Infringe upon the rights of others

• Engage in fraudulent activities or misrepresentation

• Transmit malware, viruses, or harmful code

• Attempt to gain unauthorized access to our servers, validation infrastructure, or systems

• Interfere with or disrupt the Service

• Attempt to reverse engineer or compromise the security of our products or the Service

• Spoof, falsify, or manipulate GNSS or GPS location data

• Clone, counterfeit, or duplicate NFC tags or cryptographic keys

• Harass, threaten, or harm others

• Trespass on private property or violate location access restrictions

• Resell or redistribute our services without authorization

Rate Limiting and Access Control

We implement rate limiting, access controls, and other security measures to protect the Service, including IP-based rate limiting, counter-based replay prevention, real-time abuse detection, spoof detection, and jailbreak and root detection. Excessive use, suspicious activity, or abuse of the Service may result in temporary or permanent restrictions, including restrictions on specific tag UIDs or IP addresses. We reserve the right to refuse service to any tag, user, or device at our sole discretion.

Intellectual Property

All content, software, designs, graphics, trademarks, service marks, trade names, technology, and other intellectual property related to The NFC Mint and its products and services, including the StampCats name, logo, and branding, are owned by The NFC Mint LLC or its licensors and are protected by United States and international intellectual property laws. You may not use, reproduce, distribute, modify, or create derivative works of our intellectual property without prior written permission.

Limitation of Liability

To the maximum extent permitted by law, The NFC Mint LLC and its affiliates shall not be liable for any direct, indirect, incidental, special, consequential, punitive, or exemplary damages arising from:

• Use or inability to use our products or the Service

• Product defects or failures

• Service interruptions, validation server failures, or errors

• Unauthorized access to or alteration of your transmissions or data

• False positive or false negative validation results

• Cryptographic validation failures or security breaches

• Any reliance placed on authentication or validation results

• Integration or compatibility issues

• Loss of data or business interruption

• Any injury, death, loss, or damage occurring while visiting StampCats locations

• Permanent loss of stamp collection data or passport history

• GNSS or GPS inaccuracies or location verification errors

• Theft, loss, or unauthorized use of your NFC tag

• Public disclosure of your passport data as described in these Terms

• Actions or content of other users

• Any third-party services or content

For all claims arising from or related to StampCats, our total liability to you shall not exceed the amount you paid to us for your NFC tag.

Warranties

Products are provided with a limited warranty against manufacturing defects. We make no other warranties, express or implied, including warranties of merchantability or fitness for a particular purpose. Authentication and validation services are provided "as is" without warranty.

Third-Party Services

Our products and services may integrate with or rely upon third-party services, including NXP authentication technology, cloud services, mobile platforms, mapping providers, GNSS satellite systems, and platform location services. We utilize NXP NTAG 424 DNA chip technology. NXP and NTAG are registered trademarks of NXP B.V. The NFC Mint LLC has no affiliation with NXP B.V. We are not responsible for the availability, security, content, or practices of any third-party services or technologies.

Modifications to Service and Terms

We reserve the right to modify, suspend, or discontinue products or the Service, or any portion thereof, at any time. We may also update these Terms from time to time. Changes will be posted on this page with an updated effective date. Continued use of the Service after changes constitutes acceptance of the updated Terms. It is your responsibility to review these Terms periodically.

Termination

We reserve the right to terminate, suspend, or restrict your access to the Service at our discretion, without notice, for conduct that we believe violates these Terms or is harmful to other users, us, or third parties. Termination may include permanent disabling of specific tag UIDs, blacklisting of IP addresses, or other access restrictions. We have no obligation to preserve or return stamp collection data following termination.

Indemnification

You agree to indemnify, defend, and hold harmless The NFC Mint LLC, its affiliates, officers, directors, employees, agents, licensors, and service providers from and against any and all claims, liabilities, damages, losses, costs, expenses, and fees (including reasonable attorneys' fees and court costs) arising from or related to (a) your use or misuse of our products or the Service; (b) your violation of these Terms; (c) your violation of any rights of third parties; (d) your violation of any applicable laws or regulations; (e) any injury, loss, or damage you sustain while visiting locations; (f) your public passport data; or (g) any fraudulent, negligent, or wrongful conduct by you.

Governing Law and Jurisdiction

These Terms shall be governed by and construed in accordance with the laws of the United States and the state in which The NFC Mint LLC is organized, without regard to conflict of law principles. You consent to the exclusive jurisdiction and venue of courts located within the United States for any disputes arising from these Terms or the Service.

Dispute Resolution and Arbitration

Any controversy, claim, or dispute arising out of or relating to these Terms or the Service shall be settled by binding arbitration in accordance with the Commercial Arbitration Rules of the American Arbitration Association. The arbitration shall be conducted in the English language in the United States. Judgment on the arbitration award may be entered in any court having jurisdiction. This arbitration provision does not preclude either party from seeking provisional remedies in aid of arbitration from a court of appropriate jurisdiction.

Severability

If any provision of these Terms is found to be unlawful, void, or unenforceable by a court of competent jurisdiction, that provision shall be deemed severable from these Terms and shall not affect the validity and enforceability of the remaining provisions. The remaining provisions shall be enforced to the maximum extent permitted by law.

Entire Agreement

These Terms, together with our Privacy Policy, constitute the entire agreement between you and The NFC Mint LLC regarding our products and services, superseding all prior agreements, understandings, and communications, whether written or oral, except for separately executed written agreements.

Waiver

No waiver of any term or condition of these Terms shall be deemed a further or continuing waiver of such term or condition or any other term or condition. Our failure to assert any right or provision under these Terms shall not constitute a waiver of such right or provision.

Contact Information

Contact us with questions about these Terms of Service:

Email
support@nfcmint.com

Product Questions
hello@nfcmint.com

Website
https://www.nfcmint.com/