---
title: "Block an existing card"
method: POST
path: "/cards/{cardId}/block"
tags: ["Cards"]
---

# Block an existing card

`POST /cards/{cardId}/block`

Blocking a card temporarily disables authorisation processing. This means that all _new_ authorisations will be immediately declined. Outstanding authorisations are unaffected and settlement, chargebacks, refunds, etc will continue to function as normal.

## Path parameters

- `cardId` string, required

## Response `200`

Card blocked successfully

## Other responses

- `400` — Invalid request

---

[API](https://skmtc.net/modulrfinance/apis/modulr-api.md) · [All operations](https://skmtc.net/modulrfinance/apis/modulr-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/modulrfinance/modulr-api/versions/cbd52524c8ef/schema)