Radek Mezulanik

This contact form contains Google reCaptcha as requirement. You can choose to accept attachment or not. 
If you use Classic editor, you will have a button for shortcode here.
Possible shortcodes:
<ol>
<li>
[contact]
</li>
<li>
[contact email=”yourmail@example.com” subject=”Your subject”]
</li>
<li>
[contact email=”yourmail@example.com”]
</li>
<li>
[contact subject=”Your subject”]
</li>
</ol>

Zedna Contact form

Contact from with attachments and reCaptcha in shortcode.

Florent Maillefaud

This plugin adds conditional logic to <a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">[Contact Form 7]</a>.
Send the PDF for Contact Form plugin will allow you to recover the data yourself via your form to insert them into a PDF built and prepared by you.
This plugin requires the installation and activation of the plugin Contact Form 7.
<a href="https://demo.restezconnectes.fr/send-pdf-for-contact-form-7/" rel="nofollow ugc">DEMO HERE</a> 
<a href="https://restezconnectes.fr/tutoriel-wordpress-lextension-send-pdf-for-contact-form-7/" rel="nofollow ugc">[Tutorial Here]</a>
Translations: <a href="https://translate.wordpress.org/projects/wp-plugins/send-pdf-for-contact-form-7/" rel="nofollow ugc">Here</a>
<h3>Contribute</h3>
You can contribute with code, issues and ideas at the <a href="https://github.com/Florent73/send-pdf-for-contact-form-7" rel="nofollow ugc">GitHub repository</a>.
If you like it, a review is appreciated 🙂

Send PDF for Contact Form 7

Create, customize and send PDF attachments with Contact Form 7 form

Zedna Contact form vs Send PDF for Contact Form 7