diff --git a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/BlacklistApplications.java b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/BlacklistApplications.java
index 97c1ae5dee..c37417ac61 100644
--- a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/BlacklistApplications.java
+++ b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/BlacklistApplications.java
@@ -21,7 +21,6 @@ package org.wso2.carbon.mdm.services.android.bean;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 
-import javax.validation.constraints.Pattern;
 import javax.validation.constraints.Size;
 import java.io.Serializable;
 import java.util.List;
@@ -36,7 +35,6 @@ public class BlacklistApplications extends AndroidOperation implements Serializa
     @ApiModelProperty(name = "appIdentifiers", value = "A list of application package names to be blacklisted.",
             required = true)
 	@Size(min = 2, max = 45)
-	@Pattern(regexp = "^[A-Za-z0-9]*$")
 	private List<String> appIdentifiers;
 
 	public List<String> getAppIdentifier() {
diff --git a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/wrapper/BlacklistApplicationsBeanWrapper.java b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/wrapper/BlacklistApplicationsBeanWrapper.java
index 3abf32c22c..32b107bf46 100644
--- a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/wrapper/BlacklistApplicationsBeanWrapper.java
+++ b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/bean/wrapper/BlacklistApplicationsBeanWrapper.java
@@ -32,16 +32,15 @@ import java.util.List;
 public class BlacklistApplicationsBeanWrapper {
 
     @ApiModelProperty(name = "operation", value = "Blacklist applications information", required = true)
-    @Valid
-    private BlacklistApplications operation;
+    private  @Valid BlacklistApplications operation;
     @ApiModelProperty(name = "deviceIDs", value = "List of device Ids", required = true)
     private List<String> deviceIDs;
 
-    public BlacklistApplications getOperation() {
+    public @Valid BlacklistApplications getOperation() {
         return operation;
     }
 
-    public void setOperation(BlacklistApplications operation) {
+    public void setOperation(@Valid BlacklistApplications operation) {
         this.operation = operation;
     }
 
diff --git a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/DeviceManagementAdminService.java b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/DeviceManagementAdminService.java
index a23eedb331..d923e49bde 100644
--- a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/DeviceManagementAdminService.java
+++ b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/DeviceManagementAdminService.java
@@ -24,6 +24,7 @@ import org.wso2.carbon.apimgt.annotations.api.Scope;
 import org.wso2.carbon.device.mgt.common.operation.mgt.Activity;
 import org.wso2.carbon.mdm.services.android.bean.wrapper.*;
 
+import javax.validation.Valid;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
@@ -961,7 +962,7 @@ public interface DeviceManagementAdminService {
     Response blacklistApplications(
             @ApiParam(name = "blacklistApplicationsBeanWrapper", value = "BlacklistApplications " +
                     "Configuration and DeviceIds")
-            BlacklistApplicationsBeanWrapper blacklistApplicationsBeanWrapper);
+            @Valid BlacklistApplicationsBeanWrapper blacklistApplicationsBeanWrapper);
 
     @POST
     @Path("/upgrade-firmware")
diff --git a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/impl/DeviceManagementAdminServiceImpl.java b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/impl/DeviceManagementAdminServiceImpl.java
index 20283b727f..b5eecd3e78 100644
--- a/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/impl/DeviceManagementAdminServiceImpl.java
+++ b/components/mobile-plugins/android-plugin/org.wso2.carbon.device.mgt.mobile.android.api/src/main/java/org/wso2/carbon/mdm/services/android/services/impl/DeviceManagementAdminServiceImpl.java
@@ -25,43 +25,15 @@ import org.wso2.carbon.device.mgt.common.operation.mgt.Operation;
 import org.wso2.carbon.device.mgt.common.operation.mgt.OperationManagementException;
 import org.wso2.carbon.device.mgt.core.operation.mgt.CommandOperation;
 import org.wso2.carbon.device.mgt.core.operation.mgt.ProfileOperation;
-import org.wso2.carbon.mdm.services.android.bean.ApplicationInstallation;
-import org.wso2.carbon.mdm.services.android.bean.ApplicationUninstallation;
-import org.wso2.carbon.mdm.services.android.bean.ApplicationUpdate;
-import org.wso2.carbon.mdm.services.android.bean.BlacklistApplications;
-import org.wso2.carbon.mdm.services.android.bean.Camera;
-import org.wso2.carbon.mdm.services.android.bean.DeviceEncryption;
-import org.wso2.carbon.mdm.services.android.bean.DeviceLock;
-import org.wso2.carbon.mdm.services.android.bean.ErrorResponse;
-import org.wso2.carbon.mdm.services.android.bean.LockCode;
-import org.wso2.carbon.mdm.services.android.bean.Notification;
-import org.wso2.carbon.mdm.services.android.bean.PasscodePolicy;
-import org.wso2.carbon.mdm.services.android.bean.UpgradeFirmware;
-import org.wso2.carbon.mdm.services.android.bean.Vpn;
-import org.wso2.carbon.mdm.services.android.bean.WebClip;
-import org.wso2.carbon.mdm.services.android.bean.Wifi;
-import org.wso2.carbon.mdm.services.android.bean.WipeData;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.ApplicationInstallationBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.ApplicationUninstallationBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.ApplicationUpdateBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.BlacklistApplicationsBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.CameraBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.DeviceLockBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.EncryptionBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.LockCodeBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.NotificationBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.PasswordPolicyBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.UpgradeFirmwareBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.VpnBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.WebClipBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.WifiBeanWrapper;
-import org.wso2.carbon.mdm.services.android.bean.wrapper.WipeDataBeanWrapper;
+import org.wso2.carbon.mdm.services.android.bean.*;
+import org.wso2.carbon.mdm.services.android.bean.wrapper.*;
 import org.wso2.carbon.mdm.services.android.exception.BadRequestException;
 import org.wso2.carbon.mdm.services.android.exception.UnexpectedServerErrorException;
 import org.wso2.carbon.mdm.services.android.services.DeviceManagementAdminService;
 import org.wso2.carbon.mdm.services.android.util.AndroidAPIUtils;
 import org.wso2.carbon.mdm.services.android.util.AndroidConstants;
 
+import javax.validation.Valid;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
@@ -556,7 +528,7 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe
     @POST
     @Path("/blacklist-applications")
     @Override
-    public Response blacklistApplications(BlacklistApplicationsBeanWrapper blacklistApplicationsBeanWrapper) {
+    public Response blacklistApplications(@Valid BlacklistApplicationsBeanWrapper blacklistApplicationsBeanWrapper) {
         if (log.isDebugEnabled()) {
             log.debug("Invoking 'Blacklist-Applications' operation");
         }