Hello, I am working on Adyen PayPal Drop-in integration (https://docs.adyen.com/payment-methods/paypal/web-drop-in#paypal-merchant-id ) where it says Contact PayPal Support to enable Reference Transactions on your seller account. For this, you will need your Merchant ID. I am trying to setup recurring payments for Sandbox PayPal Merchant ID U52DM5YU3YSZW Thank you
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