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Every time a customer tries to checkout using PayPal, the following error message appears:





Please refer to logs:

PayPal response:

· TIMESTAMP -> 2012-05-07T11:30:05Z

· L_ERRORCODE0 -> 10002

· L_SHORTMESSAGE0 -> Security error

· L_LONGMESSAGE0 -> Security header is not valid


PayPal returned error


Please help. My store is http;//meridiansupplements.com


My server details are:

Server information

Prestashop version:

Server information: Linux #5 SMP Thu Apr 19 15:57:29 CDT 2012 x86_64

Server software version: Apache

PHP version: 5.2.17

MySQL version: 5.5.21-55


Please help. I've now read numerous forum posts but were unable to find the answer.



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4 answers to this question

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I had this problem since a while.


Normally Error 1002 is in relation with bad API credentials, but for me it was other thing, not credentials configuration.


Check here and try this.

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incase anyone has the below error....


Paypal was working fine then stopped for no reason. I haven't done anything to my shop.


error is as follows at the end of checkout:


Authorisation to Paypal failed

Please refer to logs:

01. Paypal response:


03. Paypal returned error


I called up Paypal and they said:


it could be 1of 2 things...


1st if your hosting service uses a 3rd party service called Rack Space - they may be blocking Paypal ip because they were having problems with hacks.


2nd if your hosting service uses a server or service called ATT... it could be the reason why... some kind of conflict or bug or blockage.


It's a hosting service problem.... put in a support ticket to your hosting service to fix.


EDIT: it turned out to be ATT fault and my hosting tech support fixed it. Make sure you give your hosting service tech support the above information so they know where to start looking for the problem.

Edited by Never_give_up

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