---
title: "Add evidence to a claim"
method: PATCH
path: "/api/v1/claims/{claimId}/evidence"
tags: ["Claims"]
---

# Add evidence to a claim

`PATCH /api/v1/claims/{claimId}/evidence`

## Path parameters

- `claimId` integer, required

## Request body

- ClaimEvidenceRequestBody — evidence data
  - `fileKey` string, required — The file key for the evidence
  - `fileSize` integer, required — The file size for the evidence

## Response `201`

Evidence added to claim successfully

- AddClaimEvidenceResponse
  - `id` integer

## Other responses

- `400` — Invalid request body
- `403` — Forbidden

## Changes

- **2026-05-20** `d1eb32be5002` — 1 breaking
  - added the new required request property `fileSize`
- **2026-05-18** `a0c2063407bb` — 2 breaking, 3 info
  - the request property `fileKey` became required
  - removed the success response with the status `204`
  - added the non-success response with the status `400`
  - removed the non-success response with the status `404`
  - …1 more
- **2026-05-14** `def1cfa2791d` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/ministryofjustice/apis/openapi-definition-3/changes/api/v1/claims/:claimId/evidence/patch.md)

---

[API](https://skmtc.dev/ministryofjustice/apis/openapi-definition-3.md) · [All operations](https://skmtc.dev/ministryofjustice/apis/openapi-definition-3/llms.txt) · [OpenAPI document](https://skmtc.dev/ministryofjustice/apis/openapi-definition-3/revisions/b5fcd3dd0dc2?raw)