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

# coupon

> Coupon or promo code used.

Coupon or promo code used.

```javascript theme={null}
window._upstack('track', 'purchase', {
  transactionId: 'ORD-12345',
  value: 134.99,
  currency: 'USD',
  coupon: 'SAVE25'
});
```

| Type   | Required | Events                                      |
| ------ | -------- | ------------------------------------------- |
| string | No       | purchase, initiate\_checkout, add\_to\_cart |

## Related Properties

<CardGroup cols={2}>
  <Card title="discount" icon="tag" href="/pixel/events/properties/discount">
    Discount amount applied.
  </Card>

  <Card title="promotionId" icon="bullhorn" href="/pixel/events/properties/promotion-id">
    Promotion identifier.
  </Card>
</CardGroup>