---
title: transaction_id
framework: appstorereceipts
role: symbol
role_heading: Type
path: appstorereceipts/transaction_id
---

# transaction_id

A unique identifier for a transaction, such as a purchase, restore, or renewal.

## Declaration

```data
string transaction_id
```

## Discussion

Discussion This field is returned in the JSON response, in the responseBody.Latest_receipt_info and responseBody.Receipt.In_app arrays. This value has the same format as the transaction’s transactionIdentifier property; however, the values may not be the same. You can use this value to: Manage subscribers in your account database. Store the transaction_id, original_transaction_id, and product_id for each transaction, as a best practice to store transaction records for each customer. App Store generates a new value for transaction_id every time the subscription automatically renews or is restored on a new device. Differentiate a purchase transaction from a restore or a renewal transaction. In a purchase transaction, the transaction_id always matches the original_transaction_id. For subscriptions, it indicates the first subscription purchase. For a restore or renewal, the transaction_id does not match the original_transaction_id. If a user restores or renews the same purchase multiple times, each restore or renewal has a different transaction_id.

## See Also

### Transaction identifiers

- [original_transaction_id](appstorereceipts/original_transaction_id.md)
- [app_account_token](appstorereceipts/app_account_token.md)