We offer a $10 add-on plugin to save the PDF in a folder on local web server. Other than sending by email, we do not offer any other PDF saving method. Microsoft Outlook may offer some additional email and attachment handling automation.
Legality of Formidable’s e-signature is dependent on your industry standards. We use it combined with the IP and email addresses in the insurance industry for legal acceptance. Formidable Forms answered the question about their signature plugin this way.