diff --git a/app/src/main/java/uk/org/openseizuredetector/LogManagerControlActivity.java b/app/src/main/java/uk/org/openseizuredetector/LogManagerControlActivity.java
index a7eb350..2321f47 100644
--- a/app/src/main/java/uk/org/openseizuredetector/LogManagerControlActivity.java
+++ b/app/src/main/java/uk/org/openseizuredetector/LogManagerControlActivity.java
@@ -426,6 +426,9 @@ public class LogManagerControlActivity extends AppCompatActivity {
                     Log.i(TAG, "exception starting settings activity " + ex.toString());
                 }
                 return true;
+            case R.id.action_mark_unknown:
+                Log.i(TAG,"action_mark_unknown");
+                mLm.mWac.markUnverifiedEventsAsUnknown();
 
             default:
                 return super.onOptionsItemSelected(item);
diff --git a/app/src/main/java/uk/org/openseizuredetector/WebApiConnection.java b/app/src/main/java/uk/org/openseizuredetector/WebApiConnection.java
index f63e1b2..43ebd3a 100644
--- a/app/src/main/java/uk/org/openseizuredetector/WebApiConnection.java
+++ b/app/src/main/java/uk/org/openseizuredetector/WebApiConnection.java
@@ -34,6 +34,7 @@ import org.json.JSONObject;
 import java.io.UnsupportedEncodingException;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -49,7 +50,6 @@ public abstract class WebApiConnection {
     private String mAuthToken;
 
 
-
     public interface JSONObjectCallback {
         public void accept(JSONObject retValObj);
     }
@@ -115,7 +115,7 @@ public abstract class WebApiConnection {
 
 
     public boolean authenticate(final String uname, final String passwd, StringCallback callback) {
-        Log.e(TAG,"WebApiConnection.authenticate(username, password, callback) Not Implemented");
+        Log.e(TAG, "WebApiConnection.authenticate(username, password, callback) Not Implemented");
         return false;
     }
 
@@ -133,4 +133,99 @@ public abstract class WebApiConnection {
         return (mAuthToken);
     }
 
+
+    /**
+     * Mark all of the events with IDs contained in eventList as unknown type.
+     * @param eventList list of String IDs of the events to mark as unknown.
+     * @return true if request sent successfully or false.
+     */
+    private boolean markEventsAsUnknown(ArrayList<String>eventList) {
+        if (eventList.size()>0) {
+            Log.i(TAG,"markEventsAsUnknown - eventList.size()="+eventList.size());
+            Log.i(TAG,"markEventsAsUnknown - eventList(0) = "+eventList.get(0));
+            getEvent(eventList.get(0), new WebApiConnection.JSONObjectCallback() {
+                @Override
+                public void accept(JSONObject eventObj) {
+                    Log.v(TAG, "markEventsAsUnknown.getEvent.callback: "+eventObj);
+                    if (eventObj != null) {
+                        Log.v(TAG, "markEventsAsUnknown.getEvent.callback:  eventObj=" + eventObj.toString());
+                        try {
+                            eventObj.put("type", "Unknown");
+                            String notesStr = eventObj.getString("desc");
+                            if (notesStr == null) notesStr = new String("");
+                            notesStr = notesStr + " Set to Unknown automatically by OSD Android App";
+                            eventObj.put("desc", notesStr);
+                            updateEvent(eventObj,new WebApiConnection.JSONObjectCallback() {
+                                @Override
+                                public void accept(JSONObject eventObj) {
+                                    if (eventObj != null) {
+                                        Log.i(TAG, "markEventsAsUnknown.updateEvent.callback" + eventObj.toString());
+                                        // Remove the first item from the list,then call this whole procedure again to modify the next one on the list.
+                                        eventList.remove(0);
+                                        markEventsAsUnknown(eventList);
+                                    } else {
+                                        Log.e(TAG, "markEventsAsUnknown.updateEvent.callback - eventObj is null");
+                                    }
+                                }
+                            });
+                        } catch (JSONException e) {
+                            Log.e(TAG,"markEventsAsUnknown.getEvent.callback: Error editing eventObj");
+                        }
+                    } else {
+                        mUtil.showToast("Failed to Retrieve Event from Remote Database");
+                        return;
+                    }
+                }
+            });
+        } else {
+            Log.i(TAG,"markEventsAsUnknown(): No more events to Modify");
+            mUtil.showToast("No unvalidated events to modify :)");
+
+        }
+        return(true);
+    }
+
+    /**
+     * Mark all unverified events in the remote database as unknown
+     *
+     * @return true if request is successful or false.
+     */
+    public boolean markUnverifiedEventsAsUnknown() {
+        if (getEvents((JSONObject remoteEventsObj) -> {
+            Log.v(TAG, "markUnverifiedEventsAsUnknown.getEvents.Callback()");
+            Boolean haveUnvalidatedEvent = false;
+            if (remoteEventsObj == null) {
+                Log.e(TAG, "markUnverifiedEventsAsUnknown.getEvents.Callback:  Error Retrieving events");
+            } else {
+                try {
+                    JSONArray eventsArray = remoteEventsObj.getJSONArray("events");
+                    ArrayList<String> unvalidatedEventsList = new ArrayList<String>();
+                    for (int i = eventsArray.length() - 1; i >= 0; i--) {
+                        JSONObject eventObj = eventsArray.getJSONObject(i);
+                        String typeStr = eventObj.getString("type");
+                        if (typeStr.equals("null") || typeStr.equals("")) {
+                            haveUnvalidatedEvent = true;
+                            unvalidatedEventsList.add(eventObj.getString("id"));
+                        }
+                    }
+                    Log.v(TAG, "markUnverifiedEventsAsUnknown.getEvents.onFinish.callback - haveUnvalidatedEvent = " +
+                            haveUnvalidatedEvent);
+                    markEventsAsUnknown(unvalidatedEventsList);
+
+                } catch (JSONException e) {
+                    Log.e(TAG, "markUnverifiedEventsAsUnknown.getEvents.onFinish(): Error Parsing remoteEventsObj: " + e.getMessage());
+                    //mUtil.showToast("Error Parsing remoteEventsObj - this should not happen!!!");
+                }
+            }
+        })) {
+            Log.v(TAG, "markUnverifiedEventsAsUnknown.getEvents - requested events");
+        } else {
+            Log.v(TAG, "markUnverifiedEventsAsUnknown.getEvents - Not Logged In");
+
+        }
+
+
+        return (true);
+    }
+
 }
diff --git a/app/src/main/res/menu/log_manager_activity_menu.xml b/app/src/main/res/menu/log_manager_activity_menu.xml
index eaecd8a..a8d09e4 100644
--- a/app/src/main/res/menu/log_manager_activity_menu.xml
+++ b/app/src/main/res/menu/log_manager_activity_menu.xml
@@ -5,6 +5,10 @@
             android:id="@+id/pruneDatabaseMenuItem"
             app:showAsAction="never|withText"
             android:title="@string/prune_database" />
+        <item
+            android:id="@+id/action_mark_unknown"
+            app:showAsAction="never|withText"
+            android:title="@string/mark_unverified_events_as_unknown" />
     </group>
 
     <group android:id="@+id/grp3">
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 72b2d0e..ba03c31 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -434,4 +434,5 @@
     <string name="permissions_required">Permissions Disclosure</string>
     <string name="about_data_sharing">About Data Sharing</string>
     <string name="privacy_policy">Privacy Policy</string>
+    <string name="mark_unverified_events_as_unknown">Mark Unverified Events as Unknown</string>
 </resources>