muster Terms of Service

This is an English translation provided for convenience. The Korean version is the official version, and if there is any conflict or inconsistency between the two, the Korean version prevails.

Effective date: October 5, 2026

Chapter 1 General Provisions

Article 1 (Purpose)

These Terms set forth the rights, obligations, and responsibilities of Hatch Collectibles Co., Ltd. (the "Company") and Members in connection with the use of the muster mobile application and related services (the "Service") operated by the Company.

Article 2 (Definitions)

"Service" means all services provided by the Company, including information on sports cards and trading cards, market price information, community, store and event information, ticket sales, product sales, and brokerage of transactions between Members.
"Member" means a person who has agreed to these Terms, completed membership registration, and uses the Service.
"Seller" means a Member who sells products through the Service, or a business operator affiliated with the Company.
"Posts" means all information that a Member uploads to the Service, such as text, photos, images, and comments.
"Ticket" means an admission ticket for an event, exhibition, promotion, or similar occasion sold through the Service.
"Points" means an in-Service benefit that the Company grants to Members based on their use of the Service, participation in promotions, and the like.
"Coupon" means a voucher that entitles the holder to a discount of a certain amount or percentage at the time of payment.
"Organizer" means a business operator that holds an event and sells Tickets through the Service.
"Store Member" means a Member that is a business operator, such as a card shop, and uses the Service in the name of its store after verification by the Company.
"Chat" means the feature for exchanging messages between Members, or between a Member and a Store Member.

Article 3 (Display of Company Information)

The Company posts the following information on the initial screen of the Service or on a linked screen.

Company name: Hatch Collectibles Co., Ltd. (주식회사 해치컬렉티블스, HATCH COLLECTIBLES CO., LTD.)
Representative: Ahn Junhyung (안준형)
Address: R866, 8th Floor, 191 Dongbaekjungang-ro, Giheung-gu, Yongin-si, Gyeonggi-do (Jung-dong, City Plaza) (경기도 용인시 기흥구 동백중앙로 191, 8층 알866호(중동, 씨티프라자))
Business registration number: 860-86-04168
Mail-order business report number: 2026-Yongin Giheung-01674
Customer center: contact@muster.zone / 010-2968-2609
Chief Privacy Officer: Ahn Junhyung (안준형)
Hosting service provider: Google LLC (Google Cloud)

Article 4 (Posting and Amendment of the Terms)

The Company posts these Terms within the Service so that Members can easily review them.
The Company may amend these Terms to the extent that it does not violate applicable laws.
When amending these Terms, the Company gives notice stating the effective date and the reason for the amendment, starting 7 days before the effective date. For changes unfavorable to Members, the Company gives notice starting 30 days before the effective date and also notifies each Member individually by a method the Member can check, such as app push notification, the in-app notification box, or email (if registered).
If the Company, when giving notice under Paragraph 3, clearly informed Members that they will be deemed to have agreed unless they express their refusal by the effective date, and a Member does not express refusal, the Member is deemed to have agreed to the amended Terms. A Member who does not agree may terminate the service agreement.

Article 5 (Rules Not Covered by the Terms)

Matters not set forth in these Terms are governed by applicable laws and commercial practices, including the Act on Consumer Protection in Electronic Commerce, the Act on the Regulation of Terms and Conditions, the Act on Promotion of Information and Communications Network Utilization and Information Protection (the "Information and Communications Network Act"), and the Standard Terms and Conditions for Electronic Commerce of the Fair Trade Commission. Matters concerning the use of location-based services are governed by the separate Location-Based Services Terms of Use.

Chapter 2 Members

Article 6 (Membership Registration)

Membership registration is completed when a user logs in with an external account designated by the Company, such as Kakao, Naver, Google, or Apple ("Social Login"), confirms that the user is 14 years of age or older, agrees to these Terms and the Privacy Policy, and the Company accepts the registration.
Persons under 14 years of age may not register as Members.
The Company may refuse to accept an application falling under any of the following, or may terminate the service agreement afterward.
1. The applicant has used another person's information or provided false information
2. The applicant previously lost membership due to a violation of these Terms
3. The applicant is under 14 years of age
4. The application otherwise violates applicable laws or these Terms

Article 7 (Changes to Member Information)

If information a Member provided at registration changes, the Member must update it in the in-app settings. The Company is not responsible for any disadvantage resulting from a failure to update such information.

Article 8 (Account Management)

Members are responsible for managing the external account (Kakao, Naver, Google, or Apple) they use to log in to the Service and must not allow any third party to use it. A Member who becomes aware of unauthorized use must notify the Company immediately.

Article 9 (Membership Withdrawal and Loss of Membership)

Members may withdraw at any time through the withdrawal menu in the app, and the Company processes the withdrawal immediately.
If a transaction, delivery, or refund procedure is in progress, the withdrawal may be processed after that procedure is completed.
Upon withdrawal, any Points and Coupons held expire and will not be restored.
If a Member engages in any prohibited act under Article 23, the Company may restrict or revoke the Member's membership.
Even after withdrawal, Posts, comments, and Chat messages written by the Member and cards the Member registered as public are not deleted, and the author is displayed as "Sleeping Snorlax" (잠자고 있는 잠만보). Stories stop being public when their posting period ends. A Member who wishes to have content deleted must delete it personally before withdrawing.

Article 10 (Notices to Members)

The Company gives notice to Members by the email registered by the Member, app push notifications, in-app announcements, and the like. Notice to Members in general may be replaced by an in-app announcement posted for 7 days or more.

Chapter 3 Use of the Service

Article 11 (Provision of the Service)

The Company provides the following services.

Information on sports cards and trading cards, photo recognition, and market price information
Community, and store and event information
Sale of Tickets for events and promotions
Sale of products related to sports cards and trading cards
Brokerage of product transactions between Members
Registration, management, and public display of card collections
Chat between Members
Connection to stores offering card grading submission services
Location-based information on nearby stores and local areas
Other services designated by the Company

Article 12 (Brokerage of Transactions Between Members)

In transactions between Members, the Company only provides the transaction system as a mail-order brokerage service provider and is not a party to the transaction. The Company gives notice of this fact on the transaction screen.
The Seller is responsible for registering accurate product information, and the Seller bears responsibility for the authenticity, condition, grade, and the like of the product.
The Company provides the buyer with the information required by law, such as the Seller's name and contact information, and cooperates in resolving transaction-related disputes.

Article 12-2 (Direct Transactions)

If a Member transacts directly with another Member or a Store Member through Chat or otherwise without going through the payment feature of the Service, the Company is neither a party to nor a broker of that transaction. The parties to the transaction are responsible for the terms of the transaction, payment, and delivery of the product.

Article 12-3 (Connection to Grading Submission Services)

The Company only provides a feature that connects Members with stores offering grading submission services and is not a party to the submission agreement.
Payment of submission fees, and responsibility for shipping, storage, return, loss, or damage of cards, are determined between the Member and the store.
Grading fees displayed in the Service are based on the published rates of each grading company, and the store's submission service fee is charged separately.

Article 12-4 (Store Members)

A Store Member is linked after the Company verifies its business information.
Posts and Chats written by a Store Member are displayed in the name of the store, and staff accounts belonging to the same store may also view that store's Chats.
The store is responsible for the accuracy of the sale prices and inventory information it displays.

Article 13 (Nature of Market Price Information, etc.)

Market price information provided by the Service is processed from external transaction data such as eBay and Goldin and does not guarantee actual transaction prices or the authenticity or grade of any card. Amounts displayed in Korean won are reference values converted at the exchange rate at the time of display. Card recognition results are automatically extracted information that Members may review and edit, and Members are responsible for any transaction or investment decisions made based on this information.

Article 14 (Changes to and Suspension of the Service)

The Company may change the Service as needed for operational or technical reasons and gives advance notice of the changes.
The Company may temporarily suspend the Service due to equipment maintenance, failures, natural disasters, or similar causes, and in such cases gives advance notice. However, if unavoidable, the Company may give notice afterward.

Chapter 4 Purchases, Payment, and Refunds

Article 15 (Purchase Requests and Formation of Contract)

A Member requests a purchase by selecting a product or Ticket in the Service and entering payment information. The contract is formed when the Company or the Seller gives notice confirming the purchase. The seller of a Ticket is the Organizer, and the Ticket purchase contract is formed between the Member and the Organizer.

Article 15-2 (Status of the Company in Ticket Transactions)

In Ticket transactions, the Company only provides the transaction system as a mail-order brokerage service provider and is not a party to the Ticket transaction. The Company gives notice of this fact on the Ticket purchase screen.
The Organizer is responsible for holding, changing, and canceling the event and for the content of the event.
The Company provides the information required by law, such as the Organizer's business name, representative, and contact information, on the purchase screen and cooperates in resolving disputes between Members and Organizers.

Article 16 (Payment)

Payment is made by methods designated by the Company, such as credit card, bank transfer, or simple payment, through Toss Payments.
The Company does not directly store Members' payment information such as card numbers, and payment processing is performed by the payment service provider.

Article 17 (Delivery)

The Company or the Seller ships the product within 3 business days after payment is confirmed. However, if the product page separately states a supply time, that time applies. The delivery period and costs are displayed on the product page.

Article 18 (Withdrawal of Offer)

A Member may withdraw an offer within 7 days from the date the product is received.
Withdrawal of an offer is restricted in the following cases.
1. The product has been lost or damaged due to the Member's fault
2. The value of the product has significantly decreased due to opening a slab, opening a pack, damaging a seal, or the like
3. The product is a randomly assorted product and its contents have been revealed after opening
4. Any other case falling under the grounds for restricting withdrawal of an offer prescribed by law
The Company clearly indicates on the product page, before purchase, that a product is subject to restrictions on withdrawal of an offer.
If a product differs from what was displayed or advertised, the Member may withdraw the offer within 3 months from the date of receipt, or within 30 days from the date the Member became aware of that fact.

Article 19 (Special Provisions on Tickets)

The cancellation criteria for Tickets are as set forth in Paragraph 2, and the Company gives notice of them on the Ticket purchase screen before purchase.

Members may cancel Tickets according to the following criteria. These criteria apply even within 7 days after booking.

Time of cancellation	Refund
Before midnight on the day of booking	Full refund
Up to 10 days before the event date	Full refund
9 to 7 days before the event date	10% of the Ticket price deducted
6 to 3 days before the event date	20% deducted
2 to 1 days before the event date	30% deducted
On the event day (before the start)	90% deducted

Dates are based on the local date at the event location. Orders not yet paid (pending) are canceled without any fee.

Tickets cannot be canceled or refunded after the event has started or after admission has been confirmed (QR used).
If an event is canceled or changed for reasons attributable to the Company or the organizing party, a full refund is given.
Members must not resell purchased Tickets for profit without the Company's permission, and Tickets resold in violation of this provision may be invalidated.
Each person may purchase Tickets up to the number stated on the sales page. A Ticket (QR) is displayed only in the account of the Member who purchased it and cannot be transferred to another Member. A QR is valid for one admission only, and whether re-entry is allowed is stated on the sales page for each event.

Article 20 (Refunds)

The Company issues refunds to the original payment method within 3 business days from the date the withdrawal of offer or cancellation is confirmed. However, if a cancellation fee applies under Article 19, the refund is the amount after deducting that fee. For credit card payments, the time the refund is reflected may vary depending on the card company.

Chapter 5 Points, Coupons, and Posts

Article 21 (Points and Coupons)

The criteria for granting Points and Coupons, how to use them, and their validity periods are announced within the Service.
Points and Coupons cannot be refunded in cash and cannot be transferred to others.
Points and Coupons whose validity period has passed expire. The Company notifies Members 30 days before expiration.
Points and Coupons obtained by improper means may be revoked.

Article 22 (Rights and Responsibilities for Posts)

Copyright in Posts uploaded by a Member, such as photos and text, belongs to that Member.
Members permit the Company to use their Posts free of charge to display, search, and recommend them within the Service and to improve the card recognition feature. If the Company wishes to use Posts in media outside the Service (such as social media or advertising), it obtains the Member's prior consent.
When a Member deletes a Post, the Company stops using it. The handling of Posts upon withdrawal follows Article 9, Paragraph 5. However, portions that other Members have shared or commented on may not be deleted.
The Company may delete, or restrict the posting of, the following Posts without prior notice.
1. Posts that infringe the rights or reputation of others
2. Deceptive transaction Posts, such as counterfeit products, forged slabs, or false grades
3. Obscene material, illegal information, or advertising spam
4. Posts that expose the personal information of others
The Company may withhold from other Members any Post that automated review (including artificial intelligence) determines may be inappropriate until the review is completed.

Article 22-2 (Third-Party Intellectual Property Rights)

Copyrights and trademark rights in the images, names, logos, and related marks of trading cards displayed in the Service belong to their respective rights holders. These include, but are not limited to, card publishers (such as The Pokémon Company, Nintendo, Creatures, GAME FREAK, and BANDAI) and grading companies (such as PSA, Beckett (BGS), BRG, and GOD).
muster is an independent service and has no affiliation, sponsorship, or endorsement relationship with the above rights holders.
Card images and scanned images of grading slabs are displayed solely for reference purposes, to help Members identify cards and manage their collections.
If a rights holder or its agent requests removal of content, please contact the customer center (contact@muster.zone), and the Company will promptly take action after review.

Chapter 6 Obligations and Responsibilities

Article 23 (Prohibited Acts of Members)

Members must not engage in any of the following acts.
1. Using another person's information or registering false information
2. Selling counterfeit, forged, or stolen goods, or falsely representing grade or condition
3. Evading fees by inducing transactions outside the Service
4. Fraudulently purchasing Tickets or reselling them for profit
5. Infringing the intellectual property rights of the Company or third parties
6. Interfering with the normal operation of the Service (hacking, use of macros or automated tools, etc.)
7. Causing offense or threat to other Members, such as profanity, hate speech, harassment, or posting obscene or violent content
8. Sexual exploitation or grooming of children or adolescents, or encouraging such acts
9. Any other act that violates applicable laws
The Company applies a zero-tolerance policy to the prohibited acts in Paragraph 1. Members may report objectionable content and users through the in-Service reporting feature and may block interactions with specific users through the blocking feature.
The Company reviews reported content and users within 24 hours of receipt and takes necessary action, such as deletion or hiding from public view, or restriction of use.

Article 24 (Restrictions on Use)

If a Member violates Article 23, the Company may take measures such as hiding or deleting Posts, issuing a warning, temporary suspension, or permanent suspension of use. In urgent cases, the Company may take such measures without prior notice and notify the Member afterward. Members may file an objection to such measures through the customer center.

Article 25 (Obligations of the Company)

The Company complies with applicable laws and these Terms, and discloses and complies with its Privacy Policy to protect Members' personal information.

Article 26 (Limitation of Liability)

The Company is not liable for damages caused by reasons not involving the Company's intent or negligence, such as natural disasters, causes attributable to the Member, or illegal acts of third parties.
As a mail-order brokerage service provider in transactions between Members, the Company is not liable for disputes arising between the parties to a transaction unless the Company acted intentionally or negligently.
Unless the Company acted intentionally or with gross negligence, the Company is not liable for the reliability or accuracy of information posted by Members, or for damages resulting from the market price information or card recognition results under Article 13.

Article 27 (Dispute Resolution and Jurisdiction)

The Company handles Members' complaints and requests for remedies through the customer center.
For disputes between the Company and a Member, either party may apply for mediation to the Korea Consumer Agency or the Electronic Commerce Mediation Committee.
If a lawsuit is filed, the competent court shall be determined under the Civil Procedure Act, and the laws of the Republic of Korea apply.

Addendum

These Terms take effect on October 5, 2026.