Terminology

Term	Definition
User	A registered account in the system that can own cards, create lists, and perform trading operations.
Game	A trading card game system (like Magic: The Gathering or Pokemon) that serves as the top-level organization for cards and expansions.
Expansion	A specific set or release within a game that contains a collection of cards (for example, “Base Set” in Pokemon or “Dominaria” in Magic: The Gathering).
Card	The base design/concept of a playing card, independent of its specific printings or variations.
Product	A specific printing or version of a card, including details like its expansion, print number, and finish. This represents the actual physical item that can be owned.

Term	Definition
Inventory	A record tracking the ownership and status of products by users, with quantities and reservations.
List	A collection of products that a user wants to acquire, sell, or trade, with specified quantities and conditions. Can be user-created or system-generated (e.g., missing cards from a decklist).
Inventory Operation	A transaction record that documents changes to inventory quantities, providing an audit trail of how cards move between different states or owners.
Inventory Journal	A detailed record within an inventory operation that tracks the specific quantity changes for a product.

For the full bilingual glossary of all marketplace terms (EN/FR), see the Marketplace Terminology Lexicon.

Term	Definition
Transaction	A checkout session that groups one or more orders together. When a buyer purchases from multiple sellers in one checkout, a single transaction is created containing multiple orders (one per seller).
Order	Items from a single seller that need to be shipped to a buyer. Orders move through a lifecycle: `pending_shipment` → `shipped` → `delivered` → `completed`. Each order belongs to exactly one transaction.
Dispute	A formal complaint raised by a buyer when something goes wrong with an order (item not received, not as described, damaged, etc.). Disputes pause fund release and require resolution before the order can complete.
Refund	The mechanism for returning money to buyers. Can be triggered by cancellations, dispute resolutions, or admin actions. Only allowed in certain order statuses.
Seller Balance	The funds held for a seller from completed orders. Sellers can request payouts once their balance exceeds the minimum threshold.
Escrow	Funds held by the platform during the order lifecycle. Money moves from buyer → escrow → seller balance only after order completion (or back to buyer on refund).