> ## Documentation Index
> Fetch the complete documentation index at: https://docs.momentco.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Cases

> When to use authorisation and capture

<AccordionGroup>
  <Accordion title="Pre-order or backorder scenarios">
    Reserve funds when a customer places an order, then capture when the item ships. If the item becomes unavailable, void the authorisation instead.

    ```json theme={"system"}
    {
      "amount": 150000,
      "currency": "ZAR",
      "type": "one_time",
      "options": {
        "checkout_options": { "return_url": "https://merchant.example/return" },
        "payment_method_options": {
          "card": { "capture_method": "manual" }
        }
      }
    }
    ```
  </Accordion>

  <Accordion title="Variable final amounts">
    Authorise the estimated amount (e.g. hotel stay), then capture the actual final amount. Void the remaining authorisation.

    For example, authorise R1 500.00 for a 3-night hotel stay. If the guest checks out after 2 nights (R1 000.00), capture R1 000.00 and void the remaining authorisation.
  </Accordion>

  <Accordion title="Fraud review">
    Authorise immediately, then review the transaction asynchronously. This gives your fraud team a window to review high-value or suspicious transactions before funds are settled. Capture after approval or void if flagged.
  </Accordion>

  <Accordion title="Partial fulfillment">
    Authorise the full order amount, then capture per shipment as items become available. Void the remaining authorisation for any unshipped items.

    For example, a customer orders 3 items totalling R3 000.00. Ship item 1 (R1 200.00) and capture that amount. Ship item 2 (R800.00) and capture again. If item 3 is out of stock, void the remaining authorisation.
  </Accordion>

  <Accordion title="Tip or gratuity adjustment">
    Authorise the base amount (e.g. a restaurant bill), then capture the final amount including the tip. Void the difference if the tip is less than the authorised buffer.

    For example, authorise R500.00 for a meal. The customer adds a R75.00 tip, so you capture R575.00 (if within the authorised amount) or capture R500.00 and process the tip separately.
  </Accordion>

  <Accordion title="Rental deposits">
    Authorise a deposit amount when a customer begins a rental (e.g. car hire, equipment rental), then capture only the actual usage charges and void the remainder.

    For example, authorise R5 000.00 for a weekend car rental. The customer returns the car with no damage, so you capture R2 500.00 for the rental fee and void the remaining R2 500.00 deposit.
  </Accordion>
</AccordionGroup>

For simple, immediate payments where no review or delay is needed, use the default `capture_method: automatic`.