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You must use live PayPal credentials. Using sandbox credentials will result in an error reading “Security error: Security header is not valid” |
| Info |
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Please click here for instructions on how to integrate PayPal with Direct API landers.Please click here for instructions on integrating PayPal with CheckoutChamp. |
STEP 1
To create a PayPal Seamless Checkout MID, go to Merchants | Gateway Integrations and select the PayPal button, then click on +Activate.
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Stand Alone Transaction cannot be used with this feature. Make sure Stand Alone Transaction is unchecked inside of the campaign product.
First, contact PayPal and have the Reference Transaction Enabled on their end if you are planning to enable rebilling or upsells with PayPal.
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Make sure you check the referenceTransactions box on your PayPal MID setup to enable rebilling and upsells for seamless checkout.
After enabling the referenceTransactions option on your PayPal MID, log into your PayPal merchant account and confirm that your account is configured correctly to support Reference Transactions.
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