Error: Security header is not valid

Phthisicus · May 22, 2015, 4:12pm

When i activate PayPal account and want to pay online i get the following error: Security header is not valid

This was not in version 1.3.3

carstengrimm · May 22, 2015, 4:39pm

I can agree, have the same problem here. ( Test Mode )

Phthisicus · May 22, 2015, 5:03pm

Info: I am using normal mode btw.

Kovah · May 22, 2015, 5:30pm

As far as I know there wasn’t anything changed in the PayPal handling…

Found this: http://stackoverflow.com/a/3051629/1203515
A problem related to the PayPal accounts.

Phthisicus · May 22, 2015, 10:07pm

Thnx.

I know for sure that i typed/copied the correct information. I did it 3 times with no luck. So i deleted the API key and requested another one. That fixed it for me.

carstengrimm · May 23, 2015, 11:21pm

Security header is not valid

Error appears only if I am in test-mode. “Live” works or at least redirects to paypal and showing correct totals and invoice number.

gingerling · March 11, 2017, 5:37pm

In my case this was caused by spaces at the beginning/end of the paypal username/password/signature from when I copy pasted the info over.

Kovah · March 11, 2017, 8:31pm

This is a very helpful information! I will check this.