---
title: lineItemId
framework: externalpurchaseserverapi
role: symbol
role_heading: Type
path: externalpurchaseserverapi/lineitemid
---

# lineItemId

A unique identifier for the line item, that you determine.

## Declaration

```data
string lineItemId
```

## Mentioned in

Reporting corrections

## Discussion

Discussion Maximum length: 128 The lineItemId string must be unique for each app. Using UUIDs is recommended. All line item objects have a lineItemId, including: OneTimeBuyLineItem RefundLineItem SubscriptionBuyLineItem