averageradical

<p>Non-technical summary: Track incoming referrer and write it to any hidden form field with the identifier “referrer” (this can be created in Contact Form 7, for example; see below). Also if the WordPress site redirects from HTTP to HTTPS, this plugin also overrides the redirect to add the referrer to the https URL.</p>
<p>Technical details: This plugin runs client-side JavaScript in every page in HEAD and if there isn’t a session cookie with the name “referrer”, then it writes a session cookie with the name “referrer” and the value of either document.referrer, or if that’s empty, the URL-encoded value of window.location.href. There is another client-side JavaScript in every page before  which writes the value of the “referrer” cookie to any INPUT with the ID “referrer”, if it exists.</p>
<p>When integrating with Contact Form 7, add a hidden input field such as the following:</p>
<pre><code>[hidden referrer id:referrer]
</code></pre>
<p>And then add to the Mail’s Message Body:</p>
<pre><code>Referrer: [referrer]
</code></pre>
<p>If you’re just integrating this with HTML, just add this to any form:</p>
<pre><code><input type="hidden" id="referrer" name="referrer" />
</code></pre>


track-incoming-referrer

Track incoming referrer and write it to any hidden form field with the identifier "referrer".

kwielo

<p>This plugin blocks referrer spam that you see in your page statistics. This problem is also widely known as “spam referrer attacks”.</p>
<h4>The biggest list of spammers</h4>
<p>Plugin uses the biggest public list of URLs that are considered as a spamming services; <strong>over 2200 URLs</strong> right now! List is provided by Matomo, the biggest open source analytics system. You can find it <a href="https://github.com/matomo-org/referrer-spam-list" rel="nofollow ugc">here</a>; you can also contribute to that list by adding your own urls.</p>
<h4>Custom URLs</h4>
<p>Yep, you can add your own URLs to blacklist! In a flash! So easy…</p>
<h4>No annoying updates!</h4>
<p>This plugin uses service located on our servers to update the list of spammers, hence <strong>you do not have to update the plugin</strong> itself whenever list is updated.</p>
<h4>No need of an account!</h4>
<p>As it is said before, this plugin uses endpoint to get the actual list. That endpoint points to author’s server (https://srs.wielo.co), but there is <strong>no need of an account</strong> to use it. And no worries, this plugin <strong>do not</strong> collect any data about the users 🙂</p>
<h4>Hassle-free!</h4>
<p>You can see the current list of blocked websites in the admin panel, under “Settings/Referral Spam”. There is also time of the next update. That is it! No configuration needed! 🙂</p>
<h4>Free of any charges!</h4>
<p>It is completely free! Enjoy! 🙂</p>


Stop Referrer Spam

I's cluttered with Spam Referrer, and then tried this plugin with some doubt in mind though. :)

But found it's working like a charm.

Thank you for the effort. <3 Keep updating and fixing things. Good luck.

Worked like a charm

If you see referral spam in your analytics and would like to block it, this plugin is for you.

track-incoming-referrer vs Stop Referrer Spam