How to verify MS Form submitted outside of the organisation? (Flow + Forms)

The case

Company recruiting many short-term contractors.

Each new employee needs to provide some information in addition to their service agreement, like conflicts of interest questionnaire, privacy authorization etc.

We can easily create a Form to get all the required data including Name and email.

See simplified example below.

Short-term contractors do not have organisational accounts.

To be able users outside of the organisation submit a response, Form should allow anyone with the link submits a response.

It means that anyone can submit a response on behalf of another anonymously.
Which is definitely not right.

The solution

• Create a Form with the required fields, including Name and Email;
• Create a Flow triggered by a newly submitted response with the following logic:
  - Send a verification email to the Email address filled in the response
  - Handle received back response accordingly: do nothing if not verified or process further if verified

Thanks to @MGLovesFlow for sharing how Forms can be powered with Flow and SharePoint.

So I will not examine how to create Form and connect Flow to it.

In addition, let us focus on how to verify the response.

1. Send a verification email

This is a very simplified email.

All details provided in the email body.
In the real world business cases, you can attach a generated PDF to the email with all the provided details.

 2. Handle response

If an email was confirmed you can build required business logic in ‘If yes’ branch.