<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Header>
    <ex:RequestId xmlns:ex="urn:example:invoices">4f2c9e1a</ex:RequestId>
  </soap:Header>
  <soap:Body>
    <ex:GetInvoice xmlns:ex="urn:example:invoices">
      <ex:Number>INV-2026-0042</ex:Number>
    </ex:GetInvoice>
  </soap:Body>
</soap:Envelope>