diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/impl/ApplicationManagerImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/impl/ApplicationManagerImpl.java
index 7c404d5da7a..f0ee07acee0 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/impl/ApplicationManagerImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/impl/ApplicationManagerImpl.java
@@ -551,12 +551,12 @@ public class ApplicationManagerImpl implements ApplicationManager {
 
 
             if (application == null) {
-                throw new ApplicationManagementException("Invalid Application");
+                throw new NotFoundException("Couldn't found an application for Application ID: " + applicationId);
             }
 
             if (!isAdminUser(userName, tenantId, CarbonConstants.UI_ADMIN_PERMISSION_COLLECTION) && !application
                     .getUnrestrictedRoles().isEmpty() && isRoleExists(application.getUnrestrictedRoles(), userName)) {
-                throw new ApplicationManagementException(
+                throw new ForbiddenException(
                         "You don't have permission to delete this application. In order to delete an application you "
                                 + "need to have required permission. Application ID: " + applicationId);
             }
@@ -723,7 +723,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
                             ConnectionManagerUtil.rollbackDBTransaction();
                             throw new ApplicationManagementException(
                                     "Can't delete the application release, You have to move the "
-                                            + "lifecycle state from " + currentState + " to acceptable state");
+                                            + "lifecycle state from " + currentState + " to " + nextState);
                         }
                         currentState = nextState;
                     }
@@ -740,7 +740,6 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementDAOException(
                     "Error ocured when getting application data or application release data for application id of "
                             + applicationId + " application release UUID of the " + releaseUuid);
-
         } catch (LifeCycleManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
             throw new ApplicationManagementException(
@@ -1123,7 +1122,6 @@ public class ApplicationManagerImpl implements ApplicationManager {
                 isExistingAppRestricted = true;
             }
 
-            //todo check whether user is application owner
             if (!isAdminUser(userName, tenantId, CarbonConstants.UI_ADMIN_PERMISSION_COLLECTION) && !(
                     isExistingAppRestricted && isRoleExists(existingApplication.getUnrestrictedRoles(), userName))) {
                 ConnectionManagerUtil.rollbackDBTransaction();
diff --git a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementAPIImpl.java b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementAPIImpl.java
index 6f63200fac0..0d9b0e4e382 100644
--- a/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementAPIImpl.java
+++ b/components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementAPIImpl.java
@@ -499,11 +499,16 @@ public class ApplicationManagementAPIImpl implements ApplicationManagementAPI {
             String msg = "Invalid request to update application release for application release UUID " + applicationUUID;
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
-        } catch(NotFoundException e){
+        } catch (NotFoundException e) {
             String msg = "Couldn't found application or application release for application id: " + applicationId
                     + " and application release UUID " + applicationUUID;
-            log.error(msg,e);
+            log.error(msg, e);
             return Response.status(Response.Status.NOT_FOUND).entity(msg).build();
+        } catch (ForbiddenException e) {
+            String msg = "You don't have require permission to update the application release which has UUID "
+                    + applicationUUID;
+            log.error(msg, e);
+            return Response.status(Response.Status.FORBIDDEN).entity(msg).build();
         }
         catch (ApplicationManagementException e) {
             String msg = "Error while updating the application release of the application with UUID " + applicationUUID;
@@ -527,14 +532,23 @@ public class ApplicationManagementAPIImpl implements ApplicationManagementAPI {
             applicationStorageManager.deleteAllApplicationReleaseArtifacts(storedLocations);
             String responseMsg = "Successfully deleted the application and application releases: " + applicationId;
             return Response.status(Response.Status.OK).entity(responseMsg).build();
+        } catch (NotFoundException e) {
+            String msg =
+                    "Couldn't found application for application id: " + applicationId + " to delete the application";
+            log.error(msg, e);
+            return Response.status(Response.Status.NOT_FOUND).entity(msg).build();
+        } catch (ForbiddenException e) {
+            String msg = "You don't have require permission to delete the application which has ID " + applicationId;
+            log.error(msg, e);
+            return Response.status(Response.Status.FORBIDDEN).entity(msg).build();
         } catch (ApplicationManagementException e) {
             String msg = "Error occurred while deleting the application: " + applicationId;
             log.error(msg, e);
-            return APIUtil.getResponse(e, Response.Status.INTERNAL_SERVER_ERROR);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (ApplicationStorageManagementException e) {
             String msg = "Error occurred while deleting the application storage: " + applicationId;
             log.error(msg, e);
-            return APIUtil.getResponse(e, Response.Status.INTERNAL_SERVER_ERROR);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         }
     }
 
@@ -550,14 +564,25 @@ public class ApplicationManagementAPIImpl implements ApplicationManagementAPI {
             applicationStorageManager.deleteApplicationReleaseArtifacts(storedLocation);
             String responseMsg = "Successfully deleted the application release of: " + applicationId + "";
             return Response.status(Response.Status.OK).entity(responseMsg).build();
-        } catch (ApplicationManagementException e) {
+        }  catch (NotFoundException e) {
+            String msg = "Couldn't found application release which is having application id: " + applicationId
+                    + " and application release UUID:" + releaseUuid;
+            log.error(msg, e);
+            return Response.status(Response.Status.NOT_FOUND).entity(msg).build();
+        } catch (ForbiddenException e) {
+            String msg =
+                    "You don't have require permission to delete the application release which has UUID " + releaseUuid
+                            + " and application ID " + applicationId;
+            log.error(msg, e);
+            return Response.status(Response.Status.FORBIDDEN).entity(msg).build();
+        }catch (ApplicationManagementException e) {
             String msg = "Error occurred while deleting the application: " + applicationId;
             log.error(msg, e);
-            return APIUtil.getResponse(e, Response.Status.INTERNAL_SERVER_ERROR);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (ApplicationStorageManagementException e) {
             String msg = "Error occurred while deleting the application storage: " + applicationId;
             log.error(msg, e);
-            return APIUtil.getResponse(e, Response.Status.INTERNAL_SERVER_ERROR);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         }
     }