---
title: "Use Case Scenario: Transaction Signing With OneSpan Cloud Authentication"
slug: "use-case-scenario-transaction-signing-with-onespan-cloud-authentication"
updated: 2024-10-24T10:22:51Z
published: 2024-10-24T10:22:51Z
canonical: "docs.onespan.com/use-case-scenario-transaction-signing-with-onespan-cloud-authentication"
---

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

# Use Case Scenario: Transaction Signing With OneSpan Cloud Authentication

Involved solutions:

- OneSpan Cloud Authentication (OCA)
- Mobile Authenticator Studio

## About this scenario

This scenario simulates a transaction signing workflow.

It uses a demo site designed for a technical audience to learn how the technology can be used in a realistic scenario.

## Before you begin

For this scenario you need a pre-configured Mobile Authenticator Studio app installed on a mobile device.​ The app can be configured and downloaded from the OneSpan Cloud Authentication Technical Evaluation website ([https://gs.onespan.cloud/te-oca-sample/mas](https://gs.onespan.cloud/te-oca-sample/mas)).

You must have completed the user login workflow and have signed in as regular user (see [Use case scenario: User login](/v1/docs/use-case-scenario-user-login-with-onespan-cloud-authentication)).​

## Walkthrough: Transaction signing

To sign a transaction

1. Sign in to the OneSpan Cloud Authentication Technical Evaluation website as a registered user (see [Use case scenario: User login](/v1/docs/use-case-scenario-user-login-with-onespan-cloud-authentication)).
2. Switch to the User Board page.
3. Switch to the Transaction Signature tab.
4. On the mobile device, start a transaction and enter the transaction data fields, such as account numbers, amounts etc., and generate a signature.
5. Type the same transaction data fields in the Data Fields box of the demo website. You can specify up to 8 data fields, where each data field is separated by a comma.
6. Type the signature generated by the Mobile Authenticator Studio app in the Signature box.
7. Click Submit Transaction.

The demo website submits a message to [/users/{userID@domain}/transactions/validate](https://community.onespan.com/products/onespan-cloud-authentication/sandbox#/Transactions/transactionValidationUsingPOST) and validates the transaction signature.

## Additional considerations

- At various stages in the demo you can click Populate to fill in dummy data or recover data that you may have changed in previous steps of the workflow.