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Security header is not valid using express checkout

Thread began 5/29/2013 1:35 pm by Jon Cunningham | Last modified 5/29/2013 4:24 pm by Jon Cunningham | 975 views | 11 replies

Jon CunninghamBeta Tester

Security header is not valid using express checkout

Hi Guys

I have an issue with eCart and Express checkout.

History Brief:

Setting up eCart with PayPal Standard using Express Checkout.

Set up ecart as PayPal Pro using Express Checkout credentials.

Once created, removed Credit Card details from checkout.php

Added Local Checkout Response for both Process and Authorise

When I choose Paypal express checkout I get Security header is not valid.

I have already changed the PayPal Express checkout API Credentials in my PayPal account and get the same output when submitting order.

If anyone could help with this i would be grateful

Kind Regards

Jonathon

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