--- title: What methods does CloudSign use to identify and authenticate recipients? description: test --- [Skip to content](https://help.cloudsign.jp/en/articles/385356#main-content) - [English](https://help.cloudsign.jp/en/articles/385356) - [日本語](https://help.cloudsign.jp/ja/articles/385356) English Show submenu for translations [![クラウドサイン ヘルプセンター](https://help.cloudsign.jp/hs-fs/hubfs/%E3%82%AF%E3%83%A9%E3%82%A6%E3%83%89%E3%82%B5%E3%82%A4%E3%83%B3_logo_horizontal_white_RGB@4x-1.png?width=170&height=40&name=%E3%82%AF%E3%83%A9%E3%82%A6%E3%83%89%E3%82%B5%E3%82%A4%E3%83%B3_logo_horizontal_white_RGB@4x-1.png)](https://help.cloudsign.jp/en/?hsLang=en) Open main navigation Close main navigation - - [English](https://help.cloudsign.jp/en/articles/385356) - [日本語](https://help.cloudsign.jp/ja/articles/385356) English Show submenu for translations How can we help you? - There are no suggestions because the search field is empty. 1. [CloudSign Help Center](https://help.cloudsign.jp/en?hsLang=en) 2. [Security](https://help.cloudsign.jp/en/security?hsLang=en) # What methods does CloudSign use to identify and authenticate recipients? When a sender sends documents, the recipient receives a confirmation request email from this service containing a unique, randomly-generated URL in order to access documents. This URL is generated in a format that is impossible to guess by third parties. As such, only the recipient of the email containing the relevant URL can access documents, a method that is used to verify the identity of the actual recipient.   The sender is also able to specify optional authentication using an access code in order to access documents. Authentication using an access code available only to the actual recipient ensures an even stricter identification and authentication process. See [here](https://help.cloudsign.jp/en/articles/1043206?hsLang=en) for details about authentication using access codes.   The high-level authentication request function can also be used to ensure that documents are consented to with an even higher identitfy verification. High-level authentication request function is a function where the sender requires the recipient to complete two-factor authentication (or IdP authentication) before consenting to documents. See [here](https://help.cloudsign.jp/ja/articles/4669199?hsLang=en) for more details about advanced authentication request function - [FAQ](https://help.cloudsign.jp/en/faq?hsLang=en#main-content) - [About CloudSign](https://help.cloudsign.jp/en/faq?hsLang=en#about-cloudsign) - [About documents](https://help.cloudsign.jp/en/faq?hsLang=en#about-documents) - [About operation](https://help.cloudsign.jp/en/faq?hsLang=en#about-operation) - [notification emails](https://help.cloudsign.jp/en/faq?hsLang=en#notification-emails) - [Plans](https://help.cloudsign.jp/en/plans?hsLang=en#main-content) - [Free plan](https://help.cloudsign.jp/en/plans?hsLang=en#free-plan) - [Paid Plan](https://help.cloudsign.jp/en/plans?hsLang=en#paid-plan) - [Free option](https://help.cloudsign.jp/en/plans?hsLang=en#free-option) - [Paid option](https://help.cloudsign.jp/en/plans?hsLang=en#paid-option) - [Collaboration plan](https://help.cloudsign.jp/en/plans?hsLang=en#collaboration-plan) - [Email address setting and login setting](https://help.cloudsign.jp/en/email-address-setting-and-login-setting?hsLang=en#main-content) - [login](https://help.cloudsign.jp/en/email-address-setting-and-login-setting?hsLang=en#login) - [Sending documents](https://help.cloudsign.jp/en/sending-documents?hsLang=en#main-content) - [Upload and edit documents](https://help.cloudsign.jp/en/sending-documents?hsLang=en#upload-and-edit-documents) - [Destination settings](https://help.cloudsign.jp/en/sending-documents?hsLang=en#destination-settings) - [Bulk sending](https://help.cloudsign.jp/en/sending-documents?hsLang=en#bulk-sending) - [Settings when sending](https://help.cloudsign.jp/en/sending-documents?hsLang=en#settings-when-sending) - [Operations after sending](https://help.cloudsign.jp/en/sending-documents?hsLang=en#operations-after-sending) - [Template](https://help.cloudsign.jp/en/sending-documents?hsLang=en#template) - [Receiving documents](https://help.cloudsign.jp/en/receiving-documents?hsLang=en#main-content) - [Recipient guide](https://help.cloudsign.jp/en/receiving-documents?hsLang=en#recipient-guide) - [Receiving docs](https://help.cloudsign.jp/en/receiving-documents?hsLang=en#receiving-docs) - [Managing documents](https://help.cloudsign.jp/en/managing-documents?hsLang=en#main-content) - [Document confirmation](https://help.cloudsign.jp/en/managing-documents?hsLang=en#document-confirmation) - [Enter document information](https://help.cloudsign.jp/en/managing-documents?hsLang=en#enter-document-information) - [Document import](https://help.cloudsign.jp/en/managing-documents?hsLang=en#document-import) - [Setting ・Administrator privilege](https://help.cloudsign.jp/en/setting-administrator-privilege?hsLang=en#main-content) - [Personal settings](https://help.cloudsign.jp/en/setting-administrator-privilege?hsLang=en#personal-settings) - [Administrator settings](https://help.cloudsign.jp/en/setting-administrator-privilege?hsLang=en#administrator-settings) - [Advanced settings](https://help.cloudsign.jp/en/setting-administrator-privilege?hsLang=en#advanced-settings) - [Electronic signature](https://help.cloudsign.jp/en/electronic-signature?hsLang=en) - [API・External service linkage](https://help.cloudsign.jp/en/api-external-service-linkage?hsLang=en#main-content) - [Web API](https://help.cloudsign.jp/en/api-external-service-linkage?hsLang=en#web-api) - [External collaboration](https://help.cloudsign.jp/en/api-external-service-linkage?hsLang=en#external-collaboration) - [CloudSign Payments](https://help.cloudsign.jp/en/api-external-service-linkage?hsLang=en#cloudsign-payments) - [Law](https://help.cloudsign.jp/en/api-external-service-linkage?hsLang=en#law) - [Security](https://help.cloudsign.jp/en/security?hsLang=en) - [Troubleshooting](https://help.cloudsign.jp/en/troubleshooting?hsLang=en#main-content) - [Login](https://help.cloudsign.jp/en/troubleshooting?hsLang=en#login) - [Email sending and receiving](https://help.cloudsign.jp/en/troubleshooting?hsLang=en#email-sending-and-receiving) - [Input items / consent related](https://help.cloudsign.jp/en/troubleshooting?hsLang=en#input-items-consent-related) - [PDF / signature related](https://help.cloudsign.jp/en/troubleshooting?hsLang=en#pdf-signature-related) - [Address settings and document information](https://help.cloudsign.jp/en/troubleshooting?hsLang=en#address-settings-and-document-information) - [Others](https://help.cloudsign.jp/en/troubleshooting?hsLang=en#others) [![クラウドサイン ヘルプセンター](https://help.cloudsign.jp/hs-fs/hubfs/%E3%82%AF%E3%83%A9%E3%82%A6%E3%83%89%E3%82%B5%E3%82%A4%E3%83%B3_logo_horizontal_color_RGB@4x.png?width=170&height=40&name=%E3%82%AF%E3%83%A9%E3%82%A6%E3%83%89%E3%82%B5%E3%82%A4%E3%83%B3_logo_horizontal_color_RGB@4x.png "クラウドサイン ヘルプセンター")](https://www.cloudsign.jp/) © 2015 Bengo4.com, Inc.