---
title: "PATCH /largepersongroups/{largePersonGroupId}/persons/{personId}/persistedfaces/{persistedFaceId}"
method: PATCH
path: "/largepersongroups/{largePersonGroupId}/persons/{personId}/persistedfaces/{persistedFaceId}"
---

# PATCH /largepersongroups/{largePersonGroupId}/persons/{personId}/persistedfaces/{persistedFaceId}

`PATCH /largepersongroups/{largePersonGroupId}/persons/{personId}/persistedfaces/{persistedFaceId}`

Update a person persisted face's userData field.

## Path parameters

- `largePersonGroupId` string, required
- `personId` string, uuid, required
- `persistedFaceId` string, uuid, required

## Request body

- UpdateFaceRequest — Request to update face data.
  - `userData` string — User-provided data attached to the face. The size limit is 1KB.

## Response `200`

A successful call returns an empty response body.

## Other responses

- `default` — Error response.

## Changes

- **2018-08-01** `dcdc115e9ae8` — 1 info
  - endpoint added
- **2017-12-28** `e67414f9aeba` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/azure/apis/cognitiveservices-face/changes/largepersongroups/:largePersonGroupId/persons/:personId/persistedfaces/:persistedFaceId/patch.md)

---

[API](https://skmtc.dev/azure/apis/cognitiveservices-face.md) · [All operations](https://skmtc.dev/azure/apis/cognitiveservices-face/llms.txt) · [OpenAPI document](https://skmtc.dev/azure/apis/cognitiveservices-face/revisions/365eeb26c85a?raw)