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Paypal Refund NVP API : You do not have permission to refund this transaction...

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Get refund transaction details with PayPal NVP...

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Setting purchase order number or customer reference number with PayPal Payflow...

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PayPal SOAP and NVP...

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PayPal NVP Integration - Payment not processed...

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Classic API NVP, Classic ASP DoDirectPayment in Sandbox...

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Is NVP a better development option versus Net SDK for PayPal in an ASP.Net app?...

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Has the new Express Checkout layout removed support for "Note to seller" (and PAYMENTREQUE...