> For the complete documentation index, see [llms.txt](https://docs.leather.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.leather.io/learn/txid.md).

# What is a Transaction ID (TXID)?

A transaction ID (TXID) identifies one transaction on a blockchain. What it is used for and how to find it from Leather.

A transaction ID (TXID) is a unique identifier of one transaction. On Bitcoin it is a 64-character hexadecimal hash of the transaction data, for example:

`4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b`

Anyone can look up a TXID in a block explorer to see the transaction, its amounts and fees, and whether it is confirmed.

## What a TXID is for

* **Tracking:** follow a transaction from pending to confirmed.
* **Proof of payment:** give the TXID to the recipient so they can check the payment.
* **Support:** a wallet or exchange asks for the TXID to find your transaction.

A TXID cannot reverse a transaction. A confirmed transaction to a wrong address stays where it went.

## Find a TXID from Leather

1. On the Home screen, open the "Activity" tab.
2. Click the transaction. Leather opens it in a block explorer, which shows the TXID.

![Confirmed BTC transaction in the Activity tab](https://4209755586-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FaSQhveafXrLjROsW3JZ1%2Fuploads%2FPkFDsDiYhTOOJUaGFWxp%2Fe-support-txid-01-activity-transaction-row.png?alt=media\&token=60029913-ad81-4ceb-a329-10eb1922b5cc)

See [What is a Blockchain Explorer?](/learn/what-is-a-blockchain-explorer.md).