I have Java code runnning against Sandbox fine but it fails on Live. It returns a FAIL response when verifying the PDT. Is there any difference between these two environments, (I think I tried Live in the past and it worked a few months ago). Below I have posted my Java code could anyone take a look and see why isnt working public class VerifyPayment extends AbstractAction { private static String PAYPALUSER; private static int PAYPALITEMNO; private static final String PAGE_SUCCESS = "/jsp/buy/success.jsp"; private static final String PAGE_FAILURE = "/jsp/buy/failure.jsp"; private static final String PAGE_CANCEL = "/jsp/buy/cancel.jsp"; private static String URL_PAYPAL_VALIDATE; //PDT 1st Response Variables private static final String PARAM_TX = "tx"; private static final String PARAM_CMD = "cmd"; private static final String PARAM_CMD_VALUE = "_notify-synch"; private static final String PARAM_AT = "at"; private static String PARAM_AT_VALUE; private static final String PARAM_ITEM_NAME = "item_name"; private static final String PARAM_ITEM_NUMBER = "item_number"; private static final String PARAM_PAYMENT_STATUS = "payment_status"; private static final String PARAM_MC_GROSS = "mc_gross"; private static final String PARAM_MC_CURRENCY = "mc_currency"; private static final String PARAM_TXN_ID = "txn_id"; private static final String PARAM_RECEIVER_EMAIL = "receiver_email"; private static final String PARAM_PAYER_EMAIL = "payer_email"; private static final String RESPONSE_SUCCESS = "SUCCESS"; private static final String RESPONSE_FAIL = "FAIL"; private static final String PARAM_PAYPALEMAILADDRESS = "paypalemailaddress"; static { URL_PAYPAL_VALIDATE = (String) wb.getValue(Prefs.PATH_FULL_LICENSE, Prefs.EL_PAYPALVALIDATE); PARAM_AT_VALUE = (String) wb.getValue(Prefs.PATH_FULL_LICENSE, Prefs.EL_PAYPALPDT); PAYPALUSER = (String) wb.getValue(Prefs.PATH_FULL_LICENSE, Prefs.EL_PAYPALUSER); PAYPALITEMNO = ((Integer) wb.getValue(Prefs.PATH_FULL_LICENSE, Prefs.EL_PAYPALITEMNO)).intValue(); } public String handleRequest(Session session, HttpServletRequest request, HttpServletResponse response, String page) { try { // Read Get from PayPal and create encoded response to get full txn details String txn = request.getParameter(PARAM_TX); //Cancelled if (txn == null) { session.getUserFeedback().addMsgInfo(Messages.getMsg(Messages.BUY_CANCEL)); return PAGE_CANCEL; } //Display get from PayPal and decode it. Enumeration en = request.getParameterNames(); String readString = ""; while (en.hasMoreElements()) { String paramName = (String) en.nextElement(); String paramValue = request.getParameter(paramName); readString = readString + "&" + paramName + "=" + URLDecoder.decode(paramValue, "UTF-8"); } Controller.logger.finer("Received PDT from PayPal:" + readString); //Construct String String str = PARAM_CMD + "=" + PARAM_CMD_VALUE; en = request.getParameterNames(); while (en.hasMoreElements()) { String paramName = (String) en.nextElement(); String paramValue = request.getParameter(paramName); str = str + "&" + paramName + "=" + URLEncoder.encode(paramValue, "UTF-8"); } str = str + "&" + PARAM_AT + "=" + PARAM_AT_VALUE; Controller.logger.finer("Sending PDT to PayPal:" + str); // Send back to PayPal system to validate using POST URL u = new URL(URL_PAYPAL_VALIDATE); HttpURLConnection uc = (HttpURLConnection) u.openConnection(); uc.setDoOutput(true); uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); PrintWriter pw = new PrintWriter(uc.getOutputStream()); pw.println(str); pw.close(); BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream())); String res = in.readLine(); if (res.equals(RESPONSE_SUCCESS)) { String[] temp; HashMap vars = new HashMap(); while ((res = in.readLine()) != null) { temp = res.split("="); if (temp.length == 2) { vars.put(temp[0], URLDecoder.decode(temp[1], "UTF-8")); } else { vars.put(temp[0], ""); } } // Assign posted variables to local variables String itemName = (String) vars.get(PARAM_ITEM_NAME); int itemNumber = Integer.parseInt((String) vars.get(PARAM_ITEM_NUMBER)); String paymentStatus = (String) vars.get(PARAM_PAYMENT_STATUS); String paymentAmount = (String) vars.get(PARAM_MC_GROSS); String paymentCurrency = (String) vars.get(PARAM_MC_CURRENCY); String txnId = (String) vars.get(PARAM_TXN_ID); String receiverEmail = (String) vars.get(PARAM_RECEIVER_EMAIL); String payerEmail = (String) vars.get(PARAM_PAYER_EMAIL); if(confirmTransaction(session,txnId,receiverEmail,itemNumber)==true) { Controller.logger.finer("Transaction OK"); session.getUserData().setValue(PARAM_PAYPALEMAILADDRESS, payerEmail); session.getUserFeedback().addMsgConfirm(Messages.getMsg(Messages.BUY_SUCCESS)); return PAGE_SUCCESS; } else { Controller.logger.finer("Transaction FAILED"); session.getUserFeedback().addMsgError(Messages.getMsg(Messages.BUY_ERROR)); return PAGE_FAILURE; } } else if (res.equals(RESPONSE_FAIL)) { Controller.logger.finer("Response FAILED"); // log for investigation session.getUserFeedback().addMsgError(Messages.getMsg(Messages.BUY_ERROR)); return PAGE_FAILURE; } else { Controller.logger.finer("Response CANCELLED"); session.getUserFeedback().addMsgInfo(Messages.getMsg(Messages.BUY_CANCEL)); return PAGE_FAILURE; } } catch (Exception e) { e.printStackTrace(); session.getUserFeedback().addMsgError(Messages.getMsg(Messages.BUY_ERROR)); return PAGE_FAILURE; } } /** * PayPal has verified the transaction, now need to a few more checks to confirm */ private boolean confirmTransaction(Session session, String txnId, String receiverEmail, int itemNumber) { Controller.logger.finer("Double Checking transaction"); //Check txnId to make sure not reprocessing //Check ReceiverEmail address is my address. if (!receiverEmail.equals(PAYPALUSER)) { Controller.logger.warning("Invalid Email" + receiverEmail); session.getUserFeedback().addMsgError("Invalid Email Address provided"); return false; } //Check Item No is correct if (itemNumber != PAYPALITEMNO) { Controller.logger.warning("Invalid Item Number" + receiverEmail + ":" + itemNumber); session.getUserFeedback().addMsgError("Invalid Item Number provided"); return false; } //Check Correct amount has been paid. Controller.logger.finer("Transaction checked ok"); return true; } }

On dear the problem was the PDT String, I think I deleted the first character from the PDT Entry and when I added it in I thought it was a '1' when in fact it was a 'l'.

FYI infor this Java code now orks fine