---
title: "Freeze a transaction"
method: POST
path: "/transactions/{txId}/freeze"
tags: ["Transactions"]
---

# Freeze a transaction

`POST /transactions/{txId}/freeze`

## Request

- Base URL: `https://api.fireblocks.io/v1`
- URL: `https://api.fireblocks.io/v1/transactions/{txId}/freeze`
- Auth: none declared
- TypeScript: <https://skmtc.dev/fireblocks/apis/fireblocks-api/docs/transactions/:txId/freeze/post.ts> (a function with typed inputs; its response is checked against the schema)

Freezes a transaction by ID.

Usually used for AML integrations when the incoming funds should be quarantined.
For account based assets - the entire amount of the transaction is frozen 
For UTXO based assets - all UTXOs of the specified transaction are frozen
Endpoint Permission: Admin, Non-Signing Admin.

## Path parameters

- `txId` string, required

## Headers

- `X-End-User-Wallet-Id` string, uuid
- `Idempotency-Key` string

## Response `200`

freeze response

- FreezeTransactionResponse
  - `success` boolean

---

[API](https://skmtc.dev/fireblocks/apis/fireblocks-api.md) - [All operations](https://skmtc.dev/fireblocks/apis/fireblocks-api/llms.txt) - [OpenAPI document](https://skmtc.dev/fireblocks/apis/fireblocks-api/revisions/4eba9965659a?raw)