Title: !!! SetExpressCheckout API call failed: Security error
Last modified: December 3, 2016

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# !!! SetExpressCheckout API call failed: Security error

 *  [bistaff](https://wordpress.org/support/users/bistaff/)
 * (@bistaff)
 * [9 years, 6 months ago](https://wordpress.org/support/topic/setexpresscheckout-api-call-failed-security-error/)
 * Good afternoon,
 * I tried to connect ezforms with paypal, like I read in your guide ( [http://ez-form-calculator.ezplugins.de/documentation/paypal-integration/](http://ez-form-calculator.ezplugins.de/documentation/paypal-integration/)),
   but when I press the submit button at the end of the form, I got this error:
 * **SetExpressCheckout API call failed: Security error**.
 * My credentials are correct, I checked these.
    Could you quickly help me?

Viewing 1 replies (of 1 total)

 *  [joalmoore](https://wordpress.org/support/users/joalmoore/)
 * (@joalmoore)
 * [9 years, 5 months ago](https://wordpress.org/support/topic/setexpresscheckout-api-call-failed-security-error/#post-8607999)
 * I am having this same problem. My form sent the very first time just fine and
   then when I tried it again suddenly I am getting this same error SetExpressCheckout
   API call failed: Security error. I know my credentials are correct since it worked
   the first time and I didn’t change anything. Any idea on why it isn’t working
   all of a sudden?

Viewing 1 replies (of 1 total)

The topic ‘!!! SetExpressCheckout API call failed: Security error’ is closed to 
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 * 1 reply
 * 2 participants
 * Last reply from: [joalmoore](https://wordpress.org/support/users/joalmoore/)
 * Last activity: [9 years, 5 months ago](https://wordpress.org/support/topic/setexpresscheckout-api-call-failed-security-error/#post-8607999)
 * Status: not resolved