Terms of Service

These Terms take effect for you when you accept them on the sign-up screen. The refund rules are shown again at checkout, where you confirm them separately, and we keep a record of each acceptance with its version and time.

We notify you by email to your registered address or in the dashboard. A notice to all members may instead be posted in the Service for at least 7 days.

Version 2.1 was posted on 2026-10-19 and takes effect on 2026-11-20. Programs and Mock Pass periods you paid for before that date stay under the Terms in force when you paid. Earlier versions are available on request at legal@tieroneenglish.com.

You can create an account from age 14. We may decline or close a sign-up that uses false information, that belongs to someone under 14, or that comes from a person whose account we terminated for a breach.

One person, one account. Your account is yours alone: do not share your password, hand your account to someone else, or let another person study through it. Keep your email address and profile accurate so that notices and receipts reach you.

If you are 14 or older but under 19, you need the consent of a parent or legal guardian to buy a paid program, Mock Pass or the Mock Pass 7-day trial. We may ask for proof of that consent before or after the purchase and we keep the record with the payment.

A paid contract made without that consent can be cancelled by you or your guardian under Article 5 of the Civil Act, and we then return the payment as the law requires. This does not apply if you falsely claimed to be an adult or to have consent (Civil Act Article 17).

Creating a free account is something you can do yourself from age 14. We do not accept sign-ups under 14.

Your enrollment is complete when we confirm your payment. We then email you a confirmation with your cohort, its start date and the amount paid. The refund rules you confirmed at checkout, your receipts and the cohort dates stay on your billing page.

If a cohort does not reach its minimum size or cannot start on the announced date, we tell you at once and you choose between the next cohort and a full refund. A teacher may be replaced by another qualified teacher. If a live class is moved we tell you as early as we can, normally at least 24 hours ahead, and the recording is available for any class you cannot attend.

Each week's assignments stay open for 1 more week after that week ends, so a late first submission is accepted until the week after next begins. Revisions of work you have already submitted are not subject to this cut-off. You can re-enroll in a later cohort at any time, and your history stays on your account. We do not issue a certificate of completion for an enrollment you withdrew from. The enrollment certificate and payment confirmation show the weeks you actually attended and the amount paid net of any refund.

The price shown at checkout is the total you pay. Academy tuition is exempt from VAT; where a product is taxable, the price shown includes the tax. Prices for each program are shown on the enrollment page before you pay.

Card payments are processed by Toss Payments, and card numbers never reach us. Where card checkout is not available we accept a bank transfer, and your enrollment is activated when we confirm it. Receipts are on your billing page and in your confirmation email; a cash receipt for a bank transfer is issued on request to support@tieroneenglish.com.

If you are charged twice or charged the wrong amount, tell us and we refund the excess without delay to the payment method you used.

Before a program starts you can cancel for any reason within 7 days of payment and receive everything back (Act on Consumer Protection in Electronic Commerce, Article 17). Even after that window, cancelling before the start date returns everything you paid.

Once the course has started, the tuition-return schedule in Schedule 4 of the Academy Act Enforcement Decree applies, based on how much of the instruction period has passed. Programs longer than a month are calculated month by month.

Your writing and speaking are scored and commented on by software, including third-party language models, and the study assistant is a language model too. The Privacy Policy names each provider and what it receives.

Automated results are study feedback, not a final judgment, and they can be wrong. In live programs, writing and speaking feedback is checked by a teacher before it counts; in self-paced programs the score stands unless you ask for a review. In every program you can ask for a human review of any automated result from your teacher or at support@tieroneenglish.com. No decision with legal effect about you is made by software alone.

Automated tools have daily limits and rate limits so that they stay available to everyone. The dashboard tells you when you reach a limit and when it resets. We keep a record of each request (model, tokens, cost) and the responses you receive, for billing, abuse prevention and quality.

Study assistant messages are screened by the assistant itself and may be set aside for a person to review. We do not read your conversations otherwise. Seriously harmful content is handled as described under Restrictions, termination and leaving.

Join on time, keep your microphone muted when you are not speaking, and treat everyone with respect. A teacher may mute or remove a participant who disrupts a class. Guests invited to a session by a teacher enter with a display name only and are admitted by the teacher.

Live classes are normally recorded so that students who miss a class can catch up and so we can maintain teaching quality; the room shows a recording indicator while it runs. Recordings are available to students of the same cohort during the program and the post-program viewing period. A recording may include the shared screen, the teacher's video and audio, and the video and audio of any camera or microphone you turn on. You may keep your camera and microphone off and take part through chat; then only your display name and chat messages appear.

We do not use recordings for advertising or public release without your separate consent. How long recordings are kept is stated in the Privacy Policy. You may not record classes or share recordings outside the Service without our written permission.

The curriculum, questions, audio and video, recorded lessons, marking criteria and software are works owned by us or our providers and protected by the Copyright Act. You may use them for your own study during your enrollment and the post-program viewing period. This right ends when your contract ends or is terminated under these Terms.

You own the copyright in the writing, recordings and conversations you submit. We use your content only as needed to provide the Service: storing it, marking it, having a teacher review it, showing it back to you, and keeping the Service secure and free of abuse. We do not use your content to train language models, ours or anyone else's. Statistics that cannot identify you may be used to improve the curriculum and the marking criteria.

We ask for your separate consent before using a testimonial, a score or an excerpt in marketing. Our right to use your content ends when you delete it or close your account, except for records the law requires us to keep.

Depending on the seriousness of a breach we act in steps: a warning, a temporary suspension of your account, and finally termination. Before acting we email you the reason and the duration and give you at least 7 days to respond. Where other members are being harmed, the violation is clear, or payment fraud is confirmed, we act first and notify you right away.

We work to keep the Service reliable. If our intent or negligence causes you loss, we compensate you under the Civil Act and other applicable law. For free services we are liable only for loss caused by our intent or gross negligence.

Where we cannot provide the Service for reasons beyond our control, such as a natural disaster or a network outage, our liability may be limited, but paying members are still compensated for the unavailable period as described under What we promise.

We use outside providers for payments, video classes, automated marking, messaging and file storage. We are responsible to you for the work they do on our behalf. Services you contract for directly with a third party, such as your card issuer or a social sign-in provider, are governed by that party's terms.

If you break these Terms or the law and cause us loss, you must compensate us for that loss. If a third party makes a claim against us because of something you were at fault for, you bear the loss we suffer and our reasonable defense costs.

If you have a complaint, contact us first at support@tieroneenglish.com or 070-8018-6673 and we reply within 10 days. Separately, you may seek redress or mediation from the bodies below, and complaints about academy operations may be filed with the Seoul Gangnam Seocho Office of Education.

Lawsuits are filed with the district court for your address at the time of filing. If you have no address or it is unclear, the Civil Procedure Act decides. These Terms are governed by the law of the Republic of Korea. The Korean text of these Terms is the binding version; this English text is a translation for convenience.

If any part of these Terms is found invalid, the rest stays in force. If we do not enforce a clause once, we can still enforce it later. Notices to us go to the addresses below; notices to you go to the contact details on your account.