Title: Security Header
Last modified: August 22, 2016

---

# Security Header

 *  [lovelouibell](https://wordpress.org/support/users/lovelouibell/)
 * (@lovelouibell)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/security-header/)
 * Right at the end of the membership check out, after clicking check out with PayPal
   it says Security Header is invalid. What is a Security Header and how can I make
   it Valid
 * Here is the link to the specific page
    [https://cohortpromotions.com/http:/cohortpromotions.com/?page_id=1550&level=1](https://cohortpromotions.com/http:/cohortpromotions.com/?page_id=1550&level=1)
 * [https://wordpress.org/plugins/paid-memberships-pro/](https://wordpress.org/plugins/paid-memberships-pro/)

Viewing 1 replies (of 1 total)

 *  [Jessica Oros](https://wordpress.org/support/users/jessica-o/)
 * (@jessica-o)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/security-header/#post-5171085)
 * This error usually occurs when your payment details are incorrect on the Memberships
   > Payment Settings page. Make sure that those details are correct, and there 
   is no whitespace surrounding them in the fields. If you are using PayPal Standard,
   you might want to [check out this blog post as well.](http://www.paidmembershipspro.com/2013/09/read-using-paypal-standard-paid-memberships-pro/)

Viewing 1 replies (of 1 total)

The topic ‘Security Header’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/paid-memberships-pro_f1dacb.svg)
 * [Paid Memberships Pro - Content Restriction, User Registration, & Paid Subscriptions](https://wordpress.org/plugins/paid-memberships-pro/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/paid-memberships-pro/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/paid-memberships-pro/)
 * [Active Topics](https://wordpress.org/support/plugin/paid-memberships-pro/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/paid-memberships-pro/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/paid-memberships-pro/reviews/)

## Tags

 * [header](https://wordpress.org/support/topic-tag/header/)

 * 1 reply
 * 2 participants
 * Last reply from: [Jessica Oros](https://wordpress.org/support/users/jessica-o/)
 * Last activity: [11 years, 9 months ago](https://wordpress.org/support/topic/security-header/#post-5171085)
 * Status: not resolved