Hello,

This field does not exist in VosFactures (French version of the software), because you can actually choose your own footer (or "notes at the bottom of page") directly from your company page. The advantage is that if you have several departments, you can have as many different footers which will appear automatically on the documents: go to Settings > Company / Département and click on the name of your firm to edit it. Below the title "Company ID (documents footer)":
1) you can either check the option "Custom footer content" and indicate the footer you want to appear at the botom of your document,
2) or you can fill up the other fields. 
And save the changes. 
You can know more about it here: http://aide.vosfactures.fr/1056517-Mentions-l-gales-Bas-de-page-personnalis-

I hope I have answered your question. Please do not hesitate to get back to me if needed. 

Regards, 

Justine
Service clientèle

www.vosfactures.fr
info@vosfactures.fr