Stable ChainStable Chain

Terms of Service

Effective date: 20 October 2026

1. Scope & Acceptance

These Terms of Service ("Terms") govern access to and use of the Stable Chain service ("Service") operated by Thaumar Limited ("we", "us"). By registering for, accessing, or using the Service, you agree to these Terms. "User" means both businesses that integrate the Service ("Merchants") and persons who make deposits through it ("End Users"). If you accept these Terms on behalf of an entity, you represent that you are authorized to bind that entity.

2. Definitions

"Deposit" means funds paid by an End User through the Service as a payment to a Merchant.

"Transfer" means our sending of stablecoins (such as JPYC) to a wallet designated by a Merchant, based on a confirmed Deposit.

"Collection Partner" means a licensed payment-collection provider in Japan that we use to receive Deposits.

"Custodian" means the third-party provider that we use to hold and send crypto-assets.

3. The Service

The Service receives Deposits through Collection Partners, deducts the applicable fees, and delivers the corresponding value to the Merchant by stablecoin Transfer through the Custodian. We are not a bank, a crypto-asset exchange, or an investment service, and we do not hold fiat currency on behalf of End Users.

4. Merchant Accounts

Merchants are registered after passing our review procedures. Merchants are responsible for safeguarding their login credentials, API keys, and webhook signing secrets, and for all activity under their account. Merchants must keep their destination wallet address and settlement details accurate; we are not responsible for value sent to an address a Merchant has designated.

5. Identity Verification (KYC/AML)

Under applicable anti-money-laundering, counter-terrorist-financing, and sanctions laws, we may require information and documents for identity verification, confirmation of beneficial ownership, and transaction screening. Where we cannot verify a transaction or account, or reasonably believe that it presents a legal or compliance risk, we may, without liability, refuse, withhold, suspend, or freeze it, or return any related Deposit that has not yet been transferred.

6. Deposits, Matching & Transfers

6.1 A Deposit is reflected once we have reconciled and confirmed it. Where a Deposit cannot be matched to a Merchant or a payment request (for example, because the remitter name does not correspond to the expected information), we may withhold its reflection and the related Transfer until our review is complete.

6.2 Blockchain Transfers cannot be reversed once sent. Users are responsible for the accuracy of destination addresses and networks. We are not liable for losses resulting from incorrect addresses or networks, unsupported tokens, or network conditions (including gas fees).

7. Returns & Reversals

We may return all or part of a Deposit to its source (including by bank reversal) where: (a) the intended Merchant cannot be identified or the Deposit cannot be matched; (b) a Transfer does not complete and we consider a return appropriate; or (c) unlawful use is suspected, or we otherwise determine that a return is necessary for legal or compliance reasons. Fees and out-of-pocket costs of a return may be borne by the User.

8. Fees

Fees are set by us and shown in the Service or in the applicable agreement. Fees may be deducted from the amounts processed.

9. Prohibited Conduct

You must not: (a) violate any applicable law or use the Service for any unlawful purpose; (b) use the Service for money laundering, sanctions evasion, terrorist financing, or fraud; (c) provide false information or impersonate another person; (d) attempt unauthorized access to, interfere with, or place undue load on the Service; or (e) be, or act on behalf of, a sanctioned person.

10. Suspension & Changes to the Service

We may suspend, modify, or discontinue all or part of the Service, with or without notice, for maintenance, security, legal, or other reasons we consider necessary.

11. Disclaimers & Limitation of Liability

The Service is provided "as is" and "as available". We are not liable for delays or failures caused by third-party systems (including blockchains, financial institutions, Collection Partners, and the Custodian) except to the extent caused by our fault. To the maximum extent permitted by law, and except in cases of our willful misconduct or gross negligence, our liability is limited as set out in the applicable agreement, and we are not liable for indirect, incidental, or consequential damages.

12. Privacy

We handle personal data in accordance with our Privacy Policy, which forms part of these Terms.

13. Changes to these Terms

We may amend these Terms from time to time. Amended Terms take effect when posted in the Service. Continued use of the Service after amended Terms take effect constitutes acceptance of them.

14. Governing Law & Jurisdiction

The governing law of these Terms, and the jurisdiction for any dispute relating to them, are as set out in the applicable agreement between us and the User.

15. Third-Party Attributions

The Service uses the JMnedict dictionary provided by the Electronic Dictionary Research and Development Group (EDRDG). JMnedict is the property of EDRDG, and is used in conformance with the Group's licence (https://www.edrdg.org/edrdg/licence.html).

16. Operator & Contact

Operator: Thaumar Limited (British Virgin Islands, company number 2205225)

Registered address: Vistra Corporate Services Centre, Wickhams Cay II, Road Town, Tortola, VG1110, British Virgin Islands

Contact: support@thaumar.com