Automatically submit with URL link already submitted form

I'm trying for days to find a way to automatically submit a form by clicking a URL. Without success.

I need this because I want the user of the form to maintain updated its form. When it receives an alert mail to tell him to keep it updated its form.

Currently, going on his form again and submitting it to Google Form timestamp updates.
But now I would like that the user does not go on his form and the form is submitted directly.

Do you know the syntax to do that with a URL that I can put in my email?

Thanks for your help

I begin to address on this site http://justingale.com/2013/09/url-tricks-for-google-forms-pre-populate-and-automatically-submitting-responses/ but it does not explain how to make an editable URL 

example :

https://docs.google.com/forms/d/1MgkHLgUvfOMsi9Db79ul6IvnZmNPmEhXKpllLoHAQTU/viewform?edit2=2_ABaOnufQOzSIi1XghOExwuRD9omS8nfb-Xqpz7-qliKfcA_C4QHvkP1DbGnn

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