Jump to content
  • Checkout
  • Login
  • Get in touch


The e-commerce.

Security header is not valid. Any ideas?


Recommended Posts

When I do the final checkout I get this error message. "Security header is not valid."


I have done a search for this, and found some answers but none of them fixed the problem for me. I am using Paypal Website Payment Pro, I have all the correct API info from Paypal. And from another thread I read I have to enable Paypal Express payments. So I have enabled that as well (although that would make it confusing for a buyer)


Does anyone have any ideas?




Ohhh someone mentioned something about setting your return page on Paypal. But I never saw an option for that. Could my problem be as simple as that?

Link to comment
Share on other sites



Visit the link below:


How to Secure Your Site


Pay close attention to "SECURING THE ADMIN" - Yours is vulnerable.


It's easier to do a few security fixes now than to clean up a hacked store later.


And if you don't secure the admin your shop will be hacked.


It's just a question of when...


If I suggest you edit any file(s) make a backup first - I'm not perfect and neither are you.


"Given enough impetus a parallelogramatically shaped projectile can egress a circular orifice."

- Me -


"Headers already sent" - The definitive help


"Cannot redeclare ..." - How to find/fix it


SSL Implementation Help


Like this post? "Like" it again over there >

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...