diff --git a/css/main.css b/css/main.css
index fb9e827d2..9aaf54cc8 100644
--- a/css/main.css
+++ b/css/main.css
@@ -1131,7 +1131,7 @@ a.text-warning:hover {color: #FD7262;}
 
 .wide-page {
   background-color: #2C3E50;
-  margin: 10% 0;
+  margin: 5% 0;
   padding: 50px;
 }
 
diff --git a/index.html b/index.html
index 1df6aa092..9b11021f0 100644
--- a/index.html
+++ b/index.html
@@ -17,7 +17,8 @@
     <div class="off-canvas-wrap">
       <div class="inner-wrap">
 
-        <nav class="tab-bar" ng-class="{'hide-tab-bar' : !$root.wallet || !$root.wallet.isReady()}">
+        <nav class="tab-bar" ng-class="{'hide-tab-bar' : !$root.wallet ||
+          !$root.wallet.isReady() || $root.wallet.isLocked}">
           <section class="left-small">
             <a class="left-off-canvas-toggle menu-icon" ><span></span></a>
           </section>
@@ -39,12 +40,15 @@
         <div notifications="right top"></div>
 
         <div 
-          ng-class="{'sidebar' : $root.wallet && $root.wallet.isReady()}"
+          ng-class="{'sidebar' : $root.wallet && $root.wallet.isReady() &&
+          !$root.wallet.isLocked}"
           ng-include="'views/includes/sidebar.html'" 
           role='navigation'
-          ng-if="$root.wallet && $root.wallet.isReady()"></div>
+          ng-if="$root.wallet && $root.wallet.isReady() &&
+          !$root.wallet.isLocked"></div>
 
-        <section ng-class="{'main' : $root.wallet && $root.wallet.isReady()}" ng-view></section>
+        <section ng-class="{'main' : $root.wallet && $root.wallet.isReady() &&
+          !$root.wallet.isLocked}" ng-view></section>
 
         <a class="exit-off-canvas"></a>
 
diff --git a/js/controllers/sidebar.js b/js/controllers/sidebar.js
index f90b13f01..c7e760da7 100644
--- a/js/controllers/sidebar.js
+++ b/js/controllers/sidebar.js
@@ -74,4 +74,15 @@ angular.module('copayApp.controllers').controller('SidebarController',
       });
     }
 
+    $scope.checkIfWarning = function() {
+      if (!$rootScope.wallet.isLocked) {
+        controllerUtils.redirIfLogged();
+      }
+    };
+
+    $scope.ignoreLocked = function() {
+      $rootScope.wallet.isLocked = false;
+      controllerUtils.redirIfLogged();
+    };
+
   });
diff --git a/js/models/core/Wallet.js b/js/models/core/Wallet.js
index 55649c296..8302cbabe 100644
--- a/js/models/core/Wallet.js
+++ b/js/models/core/Wallet.js
@@ -92,6 +92,27 @@ Wallet.prototype.connectToAll = function() {
   }
 };
 
+Wallet.prototype.getIsOpen = function() {
+  return this.storage.getIsOpen(this.id);
+};
+
+Wallet.prototype.setIsOpen = function() {
+  return this.storage.setIsOpen(this.id);
+};
+
+Wallet.prototype.closeIfOpen = function() {
+  this.storage.removeIsOpen(this.id);
+};
+
+Wallet.prototype._checkLocked = function() {
+  if (this.getIsOpen()) {
+    this.isLocked = true;
+  }
+  else {
+    this.setIsOpen();
+  }
+};
+
 Wallet.prototype._handleIndexes = function(senderId, data, isInbound) {
   this.log('RECV INDEXES:', data);
   var inIndexes = HDParams.fromList(data.indexes);
@@ -409,6 +430,9 @@ Wallet.prototype._lockIncomming = function() {
 Wallet.prototype.netStart = function(callback) {
   var self = this;
   var net = this.network;
+
+  this._checkLocked();
+
   net.removeAllListeners();
   net.on('connect', self._handleConnect.bind(self));
   net.on('disconnect', self._handleDisconnect.bind(self));
diff --git a/js/models/storage/LocalEncrypted.js b/js/models/storage/LocalEncrypted.js
index df9c9c703..2dc2e9377 100644
--- a/js/models/storage/LocalEncrypted.js
+++ b/js/models/storage/LocalEncrypted.js
@@ -180,6 +180,18 @@ Storage.prototype.getLastOpened = function() {
   return this.getGlobal('lastOpened');
 }
 
+Storage.prototype.setIsOpen = function(walletId) {
+  this.setGlobal(this._key(walletId, 'isOpen'), true);
+}
+
+Storage.prototype.getIsOpen = function(walletId) {
+  return this.getGlobal(this._key(walletId, 'isOpen'));
+}
+
+Storage.prototype.removeIsOpen = function(walletId) {
+  this.localStorage.removeItem(this._key(walletId, 'isOpen'));
+}
+
 //obj contains keys to be set
 Storage.prototype.setFromObj = function(walletId, obj) {
   for (var k in obj) {
diff --git a/js/routes.js b/js/routes.js
index 712bbda17..b17bf1304 100644
--- a/js/routes.js
+++ b/js/routes.js
@@ -56,6 +56,10 @@ angular
       .when('/uri-payment/:data', {
         templateUrl: 'views/uri-payment.html'
       })
+      .when('/warning', {
+        templateUrl: 'views/warning.html',
+        validate: true
+      })
       .otherwise({
         templateUrl: 'views/errors/404.html',
         title: 'Error'
@@ -86,6 +90,9 @@ angular
         if ($rootScope.wallet && !$rootScope.wallet.isReady()) {
           $location.path('/copayers');
         }
+        if ($rootScope.wallet && $rootScope.wallet.isLocked) {
+          $location.path('/warning');
+        }
       }
     });
   })
diff --git a/js/services/controllerUtils.js b/js/services/controllerUtils.js
index f70cdb87c..1db1417eb 100644
--- a/js/services/controllerUtils.js
+++ b/js/services/controllerUtils.js
@@ -17,11 +17,14 @@ angular.module('copayApp.services')
     root.redirIfLogged = function() {
       var w = $rootScope.wallet;
       if (w) {
-        $location.path('addresses');
+        $location.path('receive');
       }
     };
 
     root.logout = function() {
+      if (!$rootScope.wallet.isLocked) {
+        $rootScope.wallet.closeIfOpen();
+      }
       Socket.removeAllListeners();
 
       $rootScope.wallet = null;
diff --git a/views/warning.html b/views/warning.html
new file mode 100644
index 000000000..1872629a5
--- /dev/null
+++ b/views/warning.html
@@ -0,0 +1,26 @@
+<div class="wide-page" ng-controller="SidebarController"
+  ng-init="checkIfWarning()">
+  <div class="text-center">
+    <img src="img/logo-negative-beta.svg" alt="Copay">
+    <div class="text-white" ng-include="'views/includes/version.html'"></div>
+  </div>
+  <h1 class="text-center text-warning">Warning!</h1>
+  <h3 class="text-center text-white">
+    This wallet appear to be open on an other tab at your browser. Are you sure
+    you want to proceed? (*)
+  </h3>
+  <div class="text-center m30v large-12 columns">
+    <div class="row">
+      <div class="large-6 medium-6 small-6 columns text-center">
+        <a href class="button gray" ng-click="signout()">No, I am not sure.</a> 
+      </div>
+      <div class="large-6 columns medium-6 small-6 text-center">
+        <a href class="button warning" ng-click="ignoreLocked()">I am. Go!</a> 
+      </div>
+    </div>
+  </div>
+  <div class="text-center text-gray small cb">
+    (*) Opening the wallet in multiple tabs could lead to unexpected results
+  </div>
+</div>
+