diff --git a/website/server/controllers/api-v2/user.js b/website/server/controllers/api-v2/user.js
index fcac86e2e1..52e12d20c3 100644
--- a/website/server/controllers/api-v2/user.js
+++ b/website/server/controllers/api-v2/user.js
@@ -1,6 +1,7 @@
 var url = require('url');
 var ipn = require('paypal-ipn');
 var _ = require('lodash');
+var validator = require('validator');
 var nconf = require('nconf');
 var asyncM = require('async');
 var shared = require('../../../../common');
@@ -89,6 +90,7 @@ api.score = function(req, res, next) {
     direction = req.params.direction,
     user = res.locals.user,
     body = req.body || {},
+    taskQuery = { userId: user._id },
     task;
 
   // Send error responses for improper API call
@@ -98,23 +100,33 @@ api.score = function(req, res, next) {
     return res.json(400, {err: ":direction must be 'up' or 'down'"});
   }
 
-  Tasks.Task.findOne({
-    _id: id,
-    userId: user._id
-  }, function(err, task){
+  if (validator.isUUID(id)) {
+    taskQuery._id = id;
+  } else {
+    taskQuery._legacyId = id;
+  }
+
+  Tasks.Task.findOne(taskQuery, function(err, task){
     if(err) return next(err);
 
     // If exists already, score it
     if (!task) {
       // If it doesn't exist, this is likely a 3rd party up/down - create a new one, then score it
       // Defaults. Other defaults are handled in user.ops.addTask()
-      task = new Tasks.Task({
-        _id: id, // TODO this might easily lead to conflicts as ids are now unique db-wide
+      var taskOptions = {
         type: body.type || 'habit',
         text: body.text || id,
         userId: user._id,
         notes: body.notes || "This task was created by a third-party service. Feel free to edit, it won't harm the connection to that service. Additionally, multiple services may piggy-back off this task." // TODO translate
-      });
+      }
+
+      if (validator.isUUID(id)) {
+        taskOptions._id = id; // TODO this might easily lead to conflicts as ids are now unique db-wide
+      } else {
+        taskOptions._legacyId = id;
+      }
+
+      task = new Tasks.Task(taskOptions);
 
       user.tasksOrder[task.type + 's'].unshift(task._id);
     }
@@ -206,12 +218,17 @@ api.getTasks = function(req, res, next) {
  * Get Task
  */
 api.getTask = function(req, res, next) {
-  var user = res.locals.user;
+  var user = res.locals.user,
+  id = req.params.id,
+  taskQuery = { userId: user._id };
 
-  Tasks.Task.findOne({
-    userId: user._id,
-    _id: req.params.id,
-  }, function (err, task) {
+  if (validator.isUUID(id)) {
+    taskQuery._id = id;
+  } else {
+    taskQuery._legacyId = id;
+  }
+
+  Tasks.Task.findOne(taskQuery, function (err, task) {
     if (err) return next(err);
     if (!task) return res.status(404).json({err: shared.i18n.t('messageTaskNotFound')});
     res.status(200).json(task.toJSONV2());
@@ -830,13 +847,19 @@ api.deleteTask = function(req, res, next) {
 };
 
 api.updateTask = function(req, res, next) {
-  var user = res.locals.user;
+  var user = res.locals.user,
+  taskQuery = { userId: user._id },
+  id = req.params.id;
+
   req.body = Tasks.Task.fromJSONV2(req.body);
 
-  Tasks.Task.findOne({
-    _id: req.params.id,
-    userId: user._id
-  }, function(err, task) {
+  if (validator.isUUID(id)) {
+    taskQuery._id = id;
+  } else {
+    taskQuery._legacyId = id;
+  }
+
+  Tasks.Task.findOne(taskQuery, function(err, task) {
     if(err) return next(err);
     if(!task) return res.status(404).json({err: 'Task not found.'})
 
diff --git a/website/server/models/task.js b/website/server/models/task.js
index 27f356efa3..0116da2371 100644
--- a/website/server/models/task.js
+++ b/website/server/models/task.js
@@ -17,6 +17,7 @@ export let tasksTypes = ['habit', 'daily', 'todo', 'reward'];
 // Important
 // When something changes here remember to update the client side model at common/script/libs/taskDefaults
 export let TaskSchema = new Schema({
+  _legacyId: String, // TODO Remove when v2 is deprecated
   type: {type: String, enum: tasksTypes, required: true, default: tasksTypes[0]},
   text: {type: String, required: true},
   notes: {type: String, default: ''},
@@ -119,7 +120,11 @@ TaskSchema.methods.scoreChallengeTask = async function scoreChallengeTask (delta
 // toJSON for API v2
 TaskSchema.methods.toJSONV2 = function toJSONV2 () {
   let toJSON = this.toJSON();
-  toJSON.id = toJSON._id;
+  if (toJSON._legacyId) {
+    toJSON.id = toJSON._legacyId;
+  } else {
+    toJSON.id = toJSON._id;
+  }
 
   let v3Tags = this.tags;