> ## Documentation Index
> Fetch the complete documentation index at: https://nayax-44d6e37b-fis-cortina.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Register

> How the Register call works across Pre-Selection and Cash transaction flows.

The `Register` call reports an approved transaction to the regional tax authority. The timing of the call and how failures are handled depend on the payment flow.

<CardGroup cols={3}>
  <Card title="Single Sale" href="/docs/fis-cortina/register-single-sale">
    Price known at card presentation. Register fires after Sale approval, before dispensing.
  </Card>

  <Card title="Authorization + Settlement" href="/docs/fis-cortina/register-auth-settlement">
    Separate authorization and settlement calls. Register fires after Settlement, after dispensing.
  </Card>

  <Card title="Cash" href="/docs/fis-cortina/register-cash">
    Register fires after a confirmed cash sale.
  </Card>
</CardGroup>

## Next steps

<CardGroup cols={2}>
  <Card title="Void" href="/docs/fis-cortina/void">
    Un-register a transaction when a product is not dispensed.
  </Card>

  <Card title="Retry & Timeout Handling" href="/docs/fis-cortina/reliability">
    Configure retry behavior and timeout handling for failed registrations.
  </Card>

  <Card title="Request & Response Reference" href="/docs/fis-cortina/response-reference">
    Full field definitions and response codes for all endpoints.
  </Card>
</CardGroup>