Terms of Service

These terms govern use of letain.estate, operated by Violet Herod in the United States (“leTAIN,” “we” or “us”). By using the service, you agree to these terms to the extent an agreement is formed under applicable law. If you do not agree, do not use the service. You must have the legal capacity and authority needed for your use, including when directing an agent on someone else’s behalf.

These terms cover the receipt library and its interfaces. A direct purchase from 767/POPCORN also uses that service’s published offer and applicable receipt contribution terms. The Privacy Policy explains information handling.

leTAIN helps people and agents find, inspect, locally verify and retain signed receipt evidence. It presents local verification separately from an optional remote check and keeps receipt versions separate.

leTAIN does not book or choose providers, settle payments for their jobs, hold funds in escrow, provide credit, guarantee participant performance, decide disputes or enforce agreements. It does not score, blacklist or punish participants for lateness. Each participant makes its own STOP/PROCEED decision.

Legacy inquiry documents and restricted prototype methods may be retained for compatibility and review. They are not a representation that a provider-booking or job-settlement service is offered. In particular, payment.record is not the witness-receipt purchase interface.

A valid POPCORN witness receipt signs that a particular digest was observed within a stated time interval, subject to the receipt’s scope and verification conditions. It does not, by itself, prove who authored the work, that a person agreed, that an action occurred, that a message was delivered, that work was completed, or that a provider was paid.

Check the original signed bytes, published issuer key, expected digest and nonce, any predecessor link, signed protocol and stated time uncertainty. A reference, screenshot, QR code, payment identifier or public summary alone is not equivalent to that verification. Local status and optional remote status must not be conflated.

Acknowledging receipt is not acceptance of work. A receipt grants no permission and does not replace consent, authority or independent judgment. Device time and locally generated interface text are not independently signed witness evidence.

A fresh witness receipt currently costs $0.001 USDC: 1000 atomic units on Base (eip155:8453), using x402 version 2. Existing-receipt verification is free. Each fresh receipt is a separate purchase; leTAIN does not add a subscription or a provider-booking charge.

Purchases go directly to 767’s receipt endpoint. The published configuration records the endpoint, fee, asset and payee. Check the live payment challenge before approving a purchase. Stop if the terms differ from the amount or destination you authorized. Your wallet or network may have costs outside this witness fee; review them before proceeding.

The payer retains control of its wallet and must explicitly authorize spending. The unpaid 402 challenge does not purchase a receipt. The local popcorn_witness tool defaults to no payment and handles the authorized retry internally when payment is approved.

Issued witness receipts are not ordinarily refundable merely because you no longer want the evidence. This does not limit mandatory refund rights or a claim concerning an incorrect charge, failed issuance or other service error. Contact Support with the receipt or transaction reference. If a payment result is unclear, preserve the evidence and seek help before authorizing another charge; do not automatically repeat a paid request.

You retain your rights in your original work and receipt files. Provide only information you have the right to use and disclose. You permit processing needed to perform the functions you request; these terms do not transfer ownership of your work to leTAIN.

Keep independent copies of evidence you need. Signed originals are not silently rewritten to correct history; a correction can be represented by a new record. This integrity rule is not a promise of permanent storage and does not override applicable privacy or deletion rights. Clearing local site data, browser failure or loss of your device can remove your local copies.

Do not forge signatures, impersonate a participant, misrepresent verification results, obtain someone else’s private records without authority, bypass access controls, overload the service, or use it unlawfully. Deleting your own local files or making a lawful privacy request is not prohibited.

We may limit requests or access as necessary to address technical abuse, protect private information, or comply with law. Such measures are not worker scoring, a blacklist, quarantine, or enforcement of a participant’s performance. They do not change an original signed statement.

To the extent permitted by law, the service is provided “as is” and “as available,” without implied warranties of merchantability, fitness for a particular purpose or noninfringement. We do not guarantee uninterrupted access, error-free operation, permanent retention, third-party availability or acceptance of a receipt in a legal proceeding.

Functions and fees may change prospectively. The applicable offer must be checked before a new paid request. A service change does not rewrite an already signed receipt or remove rights that cannot legally be waived.

To the maximum extent permitted by law, leTAIN and its operator are not liable for indirect, incidental, special, consequential or punitive damages arising from use of the service. To that same extent, aggregate liability will not exceed the fees you paid to the operator for the service during the 12 months before the claim arose.

These limits do not exclude liability for fraud, intentional misconduct, or any other liability or consumer protection that applicable law does not allow to be excluded or limited. You remain responsible for your own decisions and authorized actions; this does not excuse the operator from obligations the law places on it.

California law governs these terms, except where mandatory law requires otherwise. Nothing here removes a consumer’s nonwaivable protections or right to bring a claim where applicable law allows.

We publish revised terms here with their effective date. Material changes receive any notice or consent process required by law. Changes do not apply retroactively to remove accrued rights. If a provision cannot be enforced, the remaining terms continue to the extent permitted by law.

For questions about these terms, email letain@agentmail.to. The operator is Violet Herod, United States. Business contact: violet@briarwood.ai.

Related pages: Privacy Policy and Support.