<section><p>API error code 81128 indicates that the required parameter AuthorizationID is missing from the API call. Review your code and ensure that you’re passing a valid AuthorizationID value.</p></section><section><p><span style="font-size: 15px; line-height: 107%; font-family: Calibri, sans-serif; color: rgb(44, 46, 47);">See the </span><a style="color: blue; text-decoration: underline;" href="https://developer.paypal.com" target="_blank"><span>Developer Portal</span></a> for a
    complete list of <a style="color: blue; text-decoration: underline;" href="https://developer.paypal.com/docs/nvp-soap-api/errors/" target="_blank"><span style="color: rgb(0, 112, 224);">NVP/SOAP API error codes</span></a>.</p></section><section><p>See also:</p><p><a href="https://developer.paypal.com/api/nvp-soap/paypal-payments-standard/integration-guide/authcapture/" target="_blank">Authorization and Capture</a></p></section>

Why did I get API error code 81128?

API error code 81128 indicates that the required parameter AuthorizationID is
missing from the API call. Review your code and ensure that you’re passing a
va...

Why did I get API error code 81128? | PayPal US

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