Use this call to request receipt details in HTML format for a particular TXID (Transaction ID). This method works for card on file documents as well as transaction receipts. You will need the TXID (Transaction ID) as well as a receipt type and a targeted recipient ( Customer or Merchant ).

The following will provide a customer receipt for TXID 123: { "REFID": 123, "ReceiptType": 1 (Sales Receipt) "Recipient": 1 (Customer Copy) }

Recipient

1. Merchant
2. Customer
3. Both

Receipt Types

1. Transaction
2. Void
3. Refund
4. Annual Consent
5. Recurring Consent
6. Subscription
7. ACH Transaction
8. ACH Void
9. ACH Refund

Important you must replace all Unicode characters to consume clean HTML

Example : CleanHtml = Regex.Replace(my, @"[^\u0000-\u007F]+", string.Empty);

{
  "ReceiptGenerateResult": {
    "ErrCode": 0,
    "ErrMsg": "",
    "FunctionOk": true,
    "ReceiptHtml": "html",
    "RespMsg": "Successfully Returned Transaction Receipt Markup"
  }
}

private void RESTShowReceipt(string SessKey, int RefID, int ReceiptType, int Recipient) {
  //ReceiptType 1 TRANSACTION RECEIPT
  //ReceiptType 2 VOID RECEIPT
  //ReceiptType 3 REFUND RECEIPT
  //ReceiptType 4 ANNUAL RECEIPT
  //ReceiptType 5 RECURRING RECEIPT
  //ReceiptType 6 SUBSCRIPTION RECEIPT
  //Recipient 1 MERCHANT COPY
  //Recipient 2 CUSTOMER COPY
  //Recipient 3 DUAL COPY


  /// Session Key gathered using the Authenticate Command.
  SessKey = "70826FC89809414BB4303231333441303331343335";

  string json = JsonConvert.SerializeObject(new { REFID = RefID, ReceiptType = ReceiptType, Recipient = Recipient });

  byte[] data = Encoding.UTF8.GetBytes(json);

  // create Request 
  WebRequest request = WebRequest.Create("https://easypay5.com/APIcardProcREST/v1.0.0/Receipt/ReceiptGenerate");
  request.Method = "POST";
  request.ContentType = "application/json";
  request.ContentLength = data.Length;

  // use your session key obtained when you authenticated 
  request.Headers.Add("SessKey: " + SessKey);

  string Myheaders = request.Headers.ToString();
  string responseContent = null;

  // Using the Try block will catch communication errors 
  try {
    using (Stream stream = request.GetRequestStream()) {
      stream.Write(data, 0, data.Length);
    }
    using (WebResponse response = request.GetResponse()) {
      using (Stream stream = response.GetResponseStream()) {
        using (StreamReader sr99 = new StreamReader(stream)) {
          responseContent = sr99.ReadToEnd();
        }
      }
    }
  } catch (Exception ee) {
    MessageBox.Show("Problem communicating with EasyPay Service:" + ee.Message);
    /// important to insert your Logging function here 
    return;
  }

  // Check for null Response as this would be a critical communication error as well
  if (responseContent == null) {
    MessageBox.Show("Critical Error!");
    /// important to insert your Logging function here 
    return;
  }
  /// develop Response Object 
  var Result = JsonConvert.DeserializeObject<dynamic>(responseContent);
  bool FunctionOk = (bool)Result.ReceiptGenerateResult.FunctionOk;
  int ErrCode = (int)Result.ReceiptGenerateResult.ErrCode;
  string ErrMsg = (string)Result.ReceiptGenerateResult.ErrMsg;
  string RespMsg = (string)Result.ReceiptGenerateResult.RespMsg;

  //Check for unexpected Errors on cloud servers. If errors found Stop Processing and check ErrorCodes
  if (!FunctionOk) {
    MessageBox.Show(RespMsg + " " + ErrCode + " " + ErrMsg);
    /// important to insert your Logging function here 
    return;
  }

  /// retrieve desired receipt
  string ReceiptHtml = Result.ReceiptGenerateResult.ReceiptHtml;
  webBrowser1.DocumentText = ReceiptHtml;

}