---
title: "Update Letter CRM Entities"
method: PATCH
path: "/email/v1/letters/{letterId}"
tags: ["emailService"]
---

# Update Letter CRM Entities

`PATCH /email/v1/letters/{letterId}`

Updates the CRM entities associated with a letter.

## Path parameters

- `letterId` integer, required

## Request body

- LetterUpdateDto
  - `crm_entities` object
    - `deals` string[]
    - `leads` string[]
    - `contacts` string[]
    - `companies` string[]

## Response `200`

OK

- LetterDetails
  - `id` integer
  - `email_id` integer
  - `signature_id` integer
  - `subject` string
  - `body` string
  - `body_html` string
  - `date` integer
  - `is_read` boolean
  - `status` string
  - `contacts` LetterContact[]
    - `id` integer
    - `name` string
    - `email` string
  - `crm_entities` LetterCrmEntities

## Other responses

- `401` — Access token is missing or invalid
- `404` — Resource not found

---

[API](https://skmtc.net/uspacy/apis/uspacy-api-2.md) · [All operations](https://skmtc.net/uspacy/apis/uspacy-api-2/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/uspacy/uspacy-api-2/versions/c3f48fd1c26b/schema)