WP Referral is a very useful plugin that extends your WordPress website with a very effective referral system.
If you’re looking for a 100% referral plugin for your WordPress website / blog, you should know that WP Referral is the best. There’s no need to buy expensive affiliate plugins just to have a simple referral system onto your webspace.
Install WP Referral and start shining 
WP Referral works with standalone WordPress, WooCommerce, WP e-Commerce or any other shopping cart system that uses the default WordPress registration process.
What functionalities you’ll have:
- logged in users can have access to a referral link via shortcode
- default user profiles are extended with referral information
- administrators can see all users, their User ID their Referral ID in WordPress admin
- a cookie can be enabled to track referrals that do not sign up directly from the link provided (this is optional via plugin settings page)
With this plugin you can easily extend your WordPress installation with a referral system. Immediately after the plugin activation you’ll be able to give your users the ability to refer your website/blog and also to check how many and who really did registered all of this just by inserting a shortcode on any page or post.
The administrators will see in Users list two new columns: User ID and Referral ID. This way administrators have full control and a clear picture of their referrals activity.
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Changelog
v1.0 (August 15, 2013) – Initial release