---
title: appTransactionId
framework: appstoreservernotifications
role: symbol
role_heading: Type
path: appstoreservernotifications/apptransactionid
---

# appTransactionId

The unique identifier of the app download transaction.

## Declaration

```data
string appTransactionId
```

## Mentioned in

App Store Server Notifications changelog

## Discussion

Discussion For more information, see appTransactionID.