The error is displayed as follows:

PayPal gateway has rejected request. The totals of the cart item amounts do not match order amounts (#10413: Transaction refused because of an invalid argument. See additional error messages for details).


Go to Admin panel locate navigation System >> Configuration >> Sales

Payment Method >> Choose Paypal (exiting Paypal method which enable in fronted for example Payments Pro (Includes Express Checkout)) >> find "Transfer Cart Line Items" choose option value : No

  • thanks for you answer but i tried already this is not working @Charlie
    – Jaimin
    Apr 5 '17 at 9:54
  • Still Not working @Abhinav Singh
    – Jaimin
    Apr 5 '17 at 12:11
  • set transfer cart item line to no but not work Mar 8 '19 at 4:55
  • In my case, i activated 'SSL verification' and was not checked 'Transfer Cart Line Items'. Now, I activated this opcion in Module Paypal - Configuration - Basic Settings and works fine.
    – Marc
    Apr 12 '19 at 7:09

Go to Admin Panel > Store > Configuration > Sales Payment Method > Choose PayPal (existing PayPal method which enable in fronted for example Payments Standard)

  1. Email Associated with PayPal Merchant Account -> It should be valid PayPal Merchant Account.
  2. API Username -> It should be valid API Username.
  3. API Password -> It should be API Password.
  4. API Signature -> It should be API Signature.
  5. Enable this Solution -> It should be Yes.

Note: All above filed should be valid credentials.

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