--- title: How does CloudSign ensure the credibility of contracts? description: test --- [Skip to content](https://help.cloudsign.jp/en/articles/384948#main-content) - [English](https://help.cloudsign.jp/en/articles/384948) - [日本語](https://help.cloudsign.jp/ja/articles/384948) 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/384948) - [日本語](https://help.cloudsign.jp/ja/articles/384948) 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. [API・External service linkage](https://help.cloudsign.jp/en/api-external-service-linkage?hsLang=en) 3. [Law](https://help.cloudsign.jp/en/api-external-service-linkage?hsLang=en#law) # How does CloudSign ensure the credibility of contracts? The credibility of agreed documents is guaranteed by applying an electronic signature under the name of Bengo4.com, Inc., the company that operates “CloudSign.” All documents with concluded agreements using CloudSign are given an electronic signature that can only be issued by CloudSign, a scheme that enables identification of authentic documents. The electronic signature scheme uses digital signatures based on public key cryptography protected by a strong encryption algorithm. Furthermore, when an agreement is concluded, a “certificate of contract conclusion” is issued that states information such as an outline of the document and the conclusion date and time as issued by Bengo4.com, Inc. This certificate provides an easy way to check the date and time (by the minute) that the sender and recipient provided their consent, the email addresses of the sender and recipient, and the authentication method used to conclude the contract. - [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.