> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ecrop.de/llms.txt
> Use this file to discover all available pages before exploring further.

# Transfer

> Sign a transfer.

<Note>Refer to the [PoA](poa-mechanism) section to get more information on how to properly sign transaction requests.</Note>

<Note>Both sender (seller) and receiver (buyer) of a security need to sign the request. Hence this endpoint has to be called twice.</Note>


## OpenAPI

````yaml PATCH /omni-omni/v1/transfers/{id-in-client}
openapi: 3.0.1
info:
  contact:
    email: developers@ecrop.com
    name: ecrop OmniOmni API Support
    url: https://ecrop.de/contact/
  description: >
    # Preparation Guide

    Welcome to the comprehensive API Documentation. This document provides a
    detailed list of available APIs and methods. Before beginning your
    integration, it’s recommended to review the following essential documents:


    - **API Service Guide (Essential, Pro):** Designed for non-technical users,
    this guide helps in selecting the best API package based on business needs.
    Review it
    [here](https://youki.atlassian.net/wiki/spaces/mar/pages/534183949/API+Service+Guide).


    - **Integration Handbook:** Targeted at developers, this handbook includes
    crucial details such as endpoint URLs, authentication methods,
    request/response formats, and error handling. It is essential for successful
    integration. Access the handbooks here:

      - [🌳 Pro Package Integration Handbook]

      - [🌱 Essential Package Integration Handbook]

    Familiarizing yourself with these documents will ensure a smoother
    integration process.
  license:
    name: ecrop OmniOmni
    url: https://developers.ecrop.de/api-license/
  termsOfService: https://developers.ecrop.de/terms-of-use/
  title: OmniOmni API Catalogue
  version: 1.0.0
  x-logo:
    backgroundColor: '#DDDDDD'
    url: >-
      https://static.wixstatic.com/media/fd3e8b_a57864adb1084dea94c9fab462a8f52c~mv2.png/v1/crop/x_0,y_131,w_1253,h_295/fill/w_233,h_55,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/fd3e8b_a57864adb1084dea94c9fab462a8f52c~mv2.png
servers:
  - description: Default
    url: https://backend.sandbox.ecrop.de/ecrop-command
security:
  - Bearer Authentication: []
tags:
  - name: Auth
    description: Endpoints for OmniOmni security
  - name: Offers
    description: >
      Opportunities establishment to transfer securities between parties,
      including User interactions expressing interest in an offer
  - name: Assets
    description: >-
      Financial or non-financial instruments that can be transferred between two
      parties
  - name: Investments
    description: Asset displacement among 2 parties under offer conditions
  - name: Transfers
    description: Asset displacement among 2 parties
  - name: Documents
    description: Any document that is generated for any user action
  - name: Parties
    description: >
      A representative of individuals or any registered company, organization,
      etc...
paths:
  /omni-omni/v1/transfers/{id-in-client}:
    patch:
      tags:
        - Transfers
      summary: 🌱 Sign a transfer
      description: Sign a transfer.
      operationId: signTransfer
      parameters:
        - in: path
          name: id-in-client
          required: true
          schema:
            type: string
        - in: header
          name: X-Signature-DateTime
          schema:
            type: string
        - in: header
          name: X-Signature
          schema:
            type: string
        - in: header
          name: X-Signature-DeviceId
          schema:
            type: string
        - in: header
          name: X-Party-Email
          schema:
            type: string
      responses:
        '200':
          description: Transfer signed successfully
        '404':
          description: Transfer not found
        '422':
          description: Inconsistent state
components:
  securitySchemes:
    Bearer Authentication:
      bearerFormat: JWT
      scheme: bearer
      type: http

````