---
title: referenceLineItemId
framework: externalpurchaseserverapi
role: symbol
role_heading: Type
path: externalpurchaseserverapi/referencelineitemid
---

# referenceLineItemId

The line item identifier of another transaction, that the report  references.

## Declaration

```data
string referenceLineItemId
```

## Discussion

Discussion Maximum length: 128 Use the referenceLineItemId field when reporting a transaction that needs to reference a previous transaction. You report a transaction as a line item, which has a unique lineItemId. Use the original lineItemId as the referenceLineItemId to report the following types of new transactions: Refunds, which refer to the original transaction to which the refund applies Subscription events such as renewals, which refer to the initial buy transaction. Line items include OneTimeBuyLineItem,RefundLineItem, and SubscriptionBuyLineItem. A referenceLineItemId is valid when it references a line item in the same report, or in a report you previously submitted, successfully.

## See Also

### Providing transaction info

- [creationDate](externalpurchaseserverapi/creationdate.md)
- [eventType](externalpurchaseserverapi/eventtype.md)