POST api/CreateCreditMemo?Password={Password}

{
  "CreditMemo": {
    "Address": "sample string 1",
    "ShippedVia": "sample string 2",
    "CompanyID": 3,
    "ThirdPartyType": "sample string 4",
    "ThirdPartyCustomerID": "sample string 5",
    "PaymentTerms": "sample string 6",
    "CreditMemoNumber": "sample string 7",
    "TaxID": "sample string 8",
    "SalesDate": "2025-12-13T00:29:35.6065576-06:00"
  },
  "CreditMemoLineItem": [
    {
      "ItemNumber": "sample string 1",
      "Quantity": 1.0,
      "UnitPrice": 1.0,
      "NetPrice": 1.0,
      "Discount": 1.1,
      "ListPrice": 1.0,
      "Description": "sample string 2"
    },
    {
      "ItemNumber": "sample string 1",
      "Quantity": 1.0,
      "UnitPrice": 1.0,
      "NetPrice": 1.0,
      "Discount": 1.1,
      "ListPrice": 1.0,
      "Description": "sample string 2"
    }
  ]
}

<ThirdPartyCreditMemo xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/DataModel.API">
  <CreditMemo>
    <Address>sample string 1</Address>
    <CompanyID>3</CompanyID>
    <CreditMemoNumber>sample string 7</CreditMemoNumber>
    <PaymentTerms>sample string 6</PaymentTerms>
    <SalesDate>2025-12-13T00:29:35.6065576-06:00</SalesDate>
    <ShippedVia>sample string 2</ShippedVia>
    <TaxID>sample string 8</TaxID>
    <ThirdPartyCustomerID>sample string 5</ThirdPartyCustomerID>
    <ThirdPartyType>sample string 4</ThirdPartyType>
  </CreditMemo>
  <CreditMemoLineItem>
    <CreditMemoLineItem>
      <Description>sample string 2</Description>
      <Discount>1.1</Discount>
      <ItemNumber>sample string 1</ItemNumber>
      <ListPrice>1</ListPrice>
      <NetPrice>1</NetPrice>
      <Quantity>1</Quantity>
      <UnitPrice>1</UnitPrice>
    </CreditMemoLineItem>
    <CreditMemoLineItem>
      <Description>sample string 2</Description>
      <Discount>1.1</Discount>
      <ItemNumber>sample string 1</ItemNumber>
      <ListPrice>1</ListPrice>
      <NetPrice>1</NetPrice>
      <Quantity>1</Quantity>
      <UnitPrice>1</UnitPrice>
    </CreditMemoLineItem>
  </CreditMemoLineItem>
</ThirdPartyCreditMemo>

Sample not available.