> This page is for version v1 (default). > For other versions, use one of these documentation indexes: > - v1 (default): https://developers.truemed.com/v-1/llms.txt > For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://developers.truemed.com/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.truemed.com/_mcp/server. # Glossary > Key terms used throughout the Truemed docs, each linking to a fuller explanation where one exists. Key terms used throughout the Truemed docs. Each entry links to a fuller explanation where one exists. | Glossary term | Definition | | --------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Authorization | Placing a hold on a customer's funds without moving them yet. With [manual capture](#manual-capture), you authorize at checkout and capture later. | | Capture | Settling a payment by moving previously authorized funds. Capture can happen immediately or be [delayed](/guides/setup/api/payment-sessions/manual-delayed-capture). | | Eligible with LMN | A product that qualifies for HSA/FSA spending **only** when the customer completes a health survey and receives an LMN. See [Product eligibility](/guides/get-started/eligibility-and-qualifying-businesses#eligibility-outcomes). | | FSA (Flexible Spending Account) | An employer-sponsored, tax-advantaged account customers can use for qualified medical expenses. | | Health survey | A short questionnaire the customer completes during checkout so Truemed can assess HSA/FSA eligibility and, when needed, issue an LMN. | | HSA (Health Savings Account) | A tax-advantaged account paired with a high-deductible health plan, used for qualified medical expenses. | | Immediate capture | The default payment flow where Truemed captures funds automatically after the customer completes checkout and the payment clears review. Contrast with [manual capture](#manual-capture). | | Letter of Medical Necessity (LMN) | Documentation from a licensed provider that qualifies a purchase for HSA/FSA spending. Truemed generates it as part of the checkout flow. | | Manual capture | Also called delayed capture. A payment flow where you authorize funds at checkout and capture them later, usually when you fulfill or ship. See [Manual/Delayed Capture](/guides/setup/api/payment-sessions/manual-delayed-capture). | | Multi-capture | An extension of [manual capture](#manual-capture) that lets you capture a single authorization in more than one part, typically one capture per shipment. Off by default, and requires `request_multicapture: true` on the payment session. See [Capturing in multiple parts](/guides/setup/api/payment-sessions/manual-delayed-capture#capturing-in-multiple-parts). | | Partially eligible | A product whose price is only partly an eligible medical expense. Truemed identifies a comparable general-use product and uses its price as the non-eligible baseline; the remaining amount above that baseline is the portion that qualifies for HSA/FSA spending. | | Pay at checkout | The flow where a customer pays **directly with their HSA/FSA card** during your normal checkout. Contrast with reimbursement. See [Core Concepts](/guides/overview/core-concepts). | | Payment session | The Truemed-hosted flow a customer is redirected to in order to verify eligibility and pay. The core object behind pay-at-checkout integrations. See [How Truemed Checkout Works](/guides/setup/api/payment-sessions/how-truemed-checkout-works). | | Payment token | A stored, reusable reference to a customer's HSA/FSA payment method—used to bill subscriptions and other recurring charges. | | Pre-approved | A product that's HSA/FSA-eligible with **no LMN required**—no health survey, faster checkout. See [Product eligibility](/guides/get-started/eligibility-and-qualifying-businesses#eligibility-outcomes). | | Product catalog | Truemed's record of the SKUs you sell and their eligibility status, which powers collections, the PDP widget, and checkout messaging. See [Product Catalog](/guides/setup/api/product-catalog/overview). | | Qualification session | A pre-screen that determines a customer's HSA/FSA eligibility ahead of, or independent of, a specific purchase. | | Reconciliation | The reporting that ties Truemed payouts and transactions back to your orders. See [Reconciliations](/guides/setup/api/reconciliations/overview). | | Refund | Returning captured funds to the customer's HSA/FSA account. | | Reimbursement | The post-checkout flow: a customer pays normally, then submits a Truemed-issued LMN and itemized receipt to their HSA/FSA administrator to be paid back. | | SKU | A unique identifier for a product you sell. You submit SKUs to Truemed so it can determine their eligibility. | | Subscription | A recurring HSA/FSA charge billed on a schedule via a stored payment token. See [Subscriptions](/guides/setup/api/subscriptions/overview). | | Substantiation | Providing proof that a purchase was a qualified medical expense, sent directly to a benefits administrator or TPA. | | Void | Canceling an authorization before it's captured, releasing the hold on the customer's funds. | | Webhook | An HTTP callback Truemed sends to notify your system of events—such as a payment reaching `captured`. See [Webhooks](/guides/setup/api/resources/webhooks). |