When I checkout using PayPal express checkout, it returns an error message

PayPal gateway has rejected request. Payment has already been made for this InvoiceID (#10412: Duplicate invoice)

I have tried to reset everything but still get the same error.

How to solve this issue?


It is because the same Invoice ID has been submitted to the same PayPal business account. This always happens on dev server as the Invoice ID always reset due to re-installation.

Workaround - Allow Duplicate Invoice

Profile > Payment Receiving Preferences

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Block accidental payments > allow multiple payments per invoice ID

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  • you have any idea where this now is on the newer paypal designs?
    – Owen
    Feb 21 '18 at 16:29
  • @Owen sandbox.paypal.com/businessprofile/settings -> My selling preferences -> Block Payments Mar 19 '18 at 16:32
  • Another option is to use a different invoice & order prefix on development, such as "DEV-XXXXX" to avoid this issue. May 23 '18 at 14:09

Updating in Feb '21 PayPal account > Settings (right top gear symbol) > Seller tools (last option on menu) > scroll down to Payment Preferences > Block Accidental Payments

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