diff --git a/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java b/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java
index 1b9f6c1..9e15417 100644
--- a/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java
+++ b/pay-java-union/src/main/java/com/egzosn/pay/union/api/UnionPayService.java
@@ -617,7 +617,7 @@ public class UnionPayService extends BasePayService {
         Map<String ,Object > params = this.getCommonParam();
         UnionTransactionType.FILE_TRANSFER.convertMap(params);
         DateFormat df = new SimpleDateFormat("MMdd");
-        params.put(SDKConstants.param_settleDate,df);
+        params.put(SDKConstants.param_settleDate,df.format(billDate));
         params.put(SDKConstants.param_fileType,billType);
         params.remove(SDKConstants.param_backUrl);
         params.remove(SDKConstants.param_currencyCode);