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If you get the error message "security header is not valid" when checking out at your site. this is a PayPal error indicating that the API credentials are incorrect.
[SOLVED] Paypal API error 10002 – security error/security header is not valid – posted in Configuring and using PrestaShop: After much searching and reader of forums.
Apr 24, 2014. The Security header is not valid error is only caused for two reasons:. using your PayPal Manager credentials, and not your API Credentials. This could be the reason you are getting Security Banner Header not valid 10002.
For questions about the PayPal API used by software developers to process payments, manage invoices, monitor accounts, etc. (For user-level support, contact PayPal.
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The figo Connect API. Welcome to the figo Connect API. This API offers a unified interface to thousands of banks and numerous payment service providers.
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Why did I get API error code 10002? Issue Based on the API you're using, PayPal returned API error code 10002, L_LONGMESSAGE0=Security header is not valid;
api – Express Checkout error message: "Security header is not. – Express Checkout error message: "Security header. I encounter the error "Security header is not valid". The API. paypal error – Security header is not valid. 3.
Common payment gateway errors, the checkout process before returning back to your store from PayPal (e.g. not clicking. Security Header is Not Valid 10002.
May 15, 2017. Security header is not valid (#10002: Security error). Wrong credentials Make sure that you've put your API Username, API Password and API.
10002 Security Error – Security header is not valid. HI, I have already setup my API username, you'll just need to setup a Sandbox account with PayPal.