PayPal has a different transaction ID for the buyer and seller of a payment. If you compare the transaction ID in the IPN with the transaction ID with the seller's side, you'll find they are the same.
If a buyer calls in with his transaction ID and you want to automatically look up the matching PayPal transaction, use the GetTransactionDetails API.
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PayPal 对于付款的买方和卖方有不同的交易 ID。如果你对比IPN中的交易ID和卖家这边的交易ID，你会发现它们是相同的。
如果买家致电并提供其交易 ID，并且您希望自动查找匹配的 PayPal 交易，请使用 GetTransactionDetails API。
PayPal has a different transaction ID for the buyer and seller of a payment. If you compare the transaction ID in the IPN with the transaction ID with the seller's side, you'll find they are the same.
If a buyer calls in with his transaction ID and you want to automatically look up the matching PayPal transaction, use the GetTransactionDetails API.