> ## 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.

# Receipts

> How to format and send fiscal data for display on the device screen after a transaction.

After a successful fiscalization, you can send a structured text string in the `POSDisplay` field of the `Data` object in your `Register` response. FisCortina forwards this string to the Nayax device, where it is rendered on-screen at the end of the transaction.

<Note>
  **When to use POSDisplay.** Use this field when your fiscal authority or regional regulation requires visible confirmation of fiscal data on the device screen. Poland is a primary example. If omitted, no fiscal data slide is shown on the device.
</Note>

`POSDisplay` is a child of the `Data` object in `ExternalFisCortinaResponse`:

```json theme={null}
{
  "fiscalResponse": { ... },
  "Data": {
    "POSDisplay": "str0label:str0value;str1label:str1value;str2label:str2value;"
  }
}
```

## String format

`POSDisplay` is a UTF-8 encoded, semicolon-delimited string of up to six elements (`str0`–`str5`). Each element is a `label:value` pair. Either the label or the value may be empty, but the colon `:` separator and semicolon `;` terminator are always required.

Each slot maps to a position on the device screen. `str0` and `str1` have special rendering behavior:

| Slot          | Role                                                                           | If omitted                              |
| ------------- | ------------------------------------------------------------------------------ | --------------------------------------- |
| `str0`        | Headline at the top of the POS screen                                          | Defaults to "Tariff"                    |
| `str1`        | Propagated to the payment presentment slide when card presentment is requested | All remaining strings shift up one line |
| `str2`–`str5` | Additional data rows (label:value pairs)                                       | Line is skipped                         |

## Examples

The tabs below show how different combinations of empty slots affect the rendered output.

<Tabs>
  <Tab title="Custom headline">
    `str0` provides a custom headline. `str1`–`str5` carry fiscal data.

    ```text theme={null}
    Fiskal:Potvrđeno;Blagajnik:Ivan K.;Broj računa:EBU0000000423;Datum:06/05/2025 14:35pm;JIR:JIR-4f2c8a3e;ZKI:ZKI-98AFB231;
    ```

    | Slot | Label       | Value              |
    | ---- | ----------- | ------------------ |
    | str0 | Fiskal      | Potvrđeno          |
    | str1 | Blagajnik   | Ivan K.            |
    | str2 | Broj računa | EBU0000000423      |
    | str3 | Datum       | 06/05/2025 14:35pm |
    | str4 | JIR         | JIR-4f2c8a3e       |
    | str5 | ZKI         | ZKI-98AFB231       |
  </Tab>

  <Tab title="Default headline (str0 empty)">
    `str0` is empty so the device defaults the headline to "Tariff". `str1` is present.

    ```text theme={null}
    ;Fiscalization Data;EBU0000000000;21/09/2024 12:54pm;
    ```

    | Slot | Value                            |
    | ---- | -------------------------------- |
    | str0 | *(empty; device shows "Tariff")* |
    | str1 | Fiscalization Data               |
    | str2 | EBU0000000000                    |
    | str3 | 21/09/2024 12:54pm               |
  </Tab>

  <Tab title="Both str0 and str1 empty">
    Both `str0` and `str1` are empty. Remaining strings shift up one line position.

    ```text theme={null}
    ;;EBU0000000000;21/09/2024 12:54pm;
    ```

    | Slot | Value                                  |
    | ---- | -------------------------------------- |
    | str0 | *(empty)*                              |
    | str1 | *(empty; subsequent strings shift up)* |
    | str2 | EBU0000000000                          |
    | str3 | 21/09/2024 12:54pm                     |
  </Tab>
</Tabs>

## Next steps

<CardGroup cols={2}>
  <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>