diff --git a/src/App/Container.purs b/src/App/Container.purs
index 6795452..fa6cd9b 100644
--- a/src/App/Container.purs
+++ b/src/App/Container.purs
@@ -164,6 +164,14 @@ data Action
   -- | Currently, this handles the navigation bar.
   | ToggleAuthenticated (Maybe Token)
 
+  -- | Add a main notification, at the top of the page.
+  | AddNotif Notification
+
+  -- | Close the main notification, at the top of the page.
+  | CloseNotif
+
+data Notification = NoNotification | GoodNotification String | BadNotification String
+
 -- | The component's state is composed of:
 -- | a potential authentication token,
 -- | the current page,
@@ -173,6 +181,7 @@ type State = { token :: Maybe String
              , current_page :: Page
              , store_DomainListInterface_state :: Maybe DomainListInterface.State
              , store_AuthenticationDaemonAdmin_state :: Maybe AdminInterface.State
+             , notif :: Notification
              }
 
 -- | The list of child components: log, `WS` twice (once for each ws connection),
@@ -222,6 +231,7 @@ initialState _ = { token: Nothing
                  , current_page: Home
                  , store_DomainListInterface_state: Nothing
                  , store_AuthenticationDaemonAdmin_state: Nothing
+                 , notif: NoNotification
                  }
 
 render :: forall m. MonadAff m => State -> H.ComponentHTML Action ChildSlots m
@@ -229,6 +239,10 @@ render state
   = HH.div_ $
     [ render_header
     , render_nav
+    , case state.notif of
+      NoNotification -> HH.div_ []
+      GoodNotification v -> Bulma.box [Bulma.notification_primary v CloseNotif]
+      BadNotification  v -> Bulma.box [Bulma.notification_danger  v CloseNotif]
     , case state.current_page of
         Home           -> render_home
         Authentication -> render_auth_form
@@ -491,9 +505,11 @@ handleAction = case _ of
             { current_page } <- H.get
             case current_page of
               Registration -> do
-                handleAction $ Log $ SuccessLog """
-          You are now registered, copy the token we sent you by email to finish your registration.
+                let successlog = """
+                    You are now registered, copy the token we sent you by email to finish your registration.
                 """
+                handleAction $ Log $ SuccessLog successlog
+                handleAction $ AddNotif $ GoodNotification successlog
                 handleAction $ Routing MailValidation
               _ -> handleAction $ DispatchAuthDaemonMessage m
           (AuthD.GotUserEdited u) -> do
@@ -501,6 +517,7 @@ handleAction = case _ of
           (AuthD.GotUserValidated _) -> do
             handleAction $ Log $ SuccessLog "User got validated! You can now log in!"
             handleAction $ Routing Authentication
+            handleAction $ AddNotif $ GoodNotification "User got validated! You can now log in!"
           (AuthD.GotUsersList _) -> do
             handleAction $ Log $ ErrorLog "TODO: received a GotUsersList message."
           (AuthD.GotPermissionCheck _) -> do
@@ -510,6 +527,7 @@ handleAction = case _ of
           m@(AuthD.GotPasswordRecovered _) -> do
             handleAction $ Log $ SuccessLog "your new password is now valid!"
             handleAction $ DispatchAuthDaemonMessage m
+            handleAction $ AddNotif $ GoodNotification "Your new password is now valid!"
           m@(AuthD.GotMatchingUsers _) -> do
             { current_page } <- H.get
             case current_page of
@@ -524,56 +542,73 @@ handleAction = case _ of
                 "received a GotUserDeleted message while not on authd admin page."
           (AuthD.GotErrorMustBeAuthenticated _) -> do
             handleAction $ Log $ ErrorLog "received a GotErrorMustBeAuthenticated message."
+            handleAction $ AddNotif $ BadNotification "Sorry, you must be authenticated to perform this action."
           (AuthD.GotErrorAlreadyUsedLogin _) -> do
             handleAction $ Log $ ErrorLog "received a GotErrorAlreadyUsedLogin message."
+            handleAction $ AddNotif $ BadNotification "Sorry, your login is already taken."
           (AuthD.GotErrorUserNotFound _) -> do
             handleAction $ Log $ ErrorLog "received a GotErrorUserNotFound message."
+            handleAction $ AddNotif $ BadNotification "User hasn't been found."
 
           -- The authentication failed.
           (AuthD.GotError errmsg) -> do
             handleAction $ Log $ ErrorLog $ " generic error message: "
               <> maybe "server didn't tell why" (\v -> v) errmsg.reason
+            handleAction $ AddNotif $ BadNotification $ "Sorry, authd sent an error message."
+              <> maybe "The server didn't tell why." (\v -> "Message was: " <> v) errmsg.reason
           m@(AuthD.GotPasswordRecoverySent _) -> do
             handleAction $ Log $ SuccessLog $ "Password recovery: email sent!"
+            handleAction $ AddNotif $ GoodNotification "Your password recovery mail has been sent!"
             handleAction $ DispatchAuthDaemonMessage m
           (AuthD.GotErrorPasswordTooShort _) -> do
             handleAction $ Log $ ErrorLog "Password too short!"
+            handleAction $ AddNotif $ BadNotification "The server told that your password is too short."
           (AuthD.GotErrorMailRequired _) -> do
             handleAction $ Log $ ErrorLog "Email required!"
+            handleAction $ AddNotif $ BadNotification "An email is required."
           (AuthD.GotErrorInvalidCredentials _) -> do
             handleAction $ Log $ ErrorLog "Invalid credentials!"
             handleAction $ ToggleAuthenticated Nothing
+            handleAction $ AddNotif $ BadNotification "Invalid credentials!"
           (AuthD.GotErrorRegistrationsClosed _) -> do
             handleAction $ Log $ ErrorLog "Registration closed! Try another time or contact an administrator."
+            handleAction $ AddNotif $ BadNotification "Registration are closed at the moment."
           (AuthD.GotErrorInvalidLoginFormat _) -> do
             handleAction $ Log $ ErrorLog "Invalid login format!"
+            handleAction $ AddNotif $ BadNotification "Invalid login format."
           (AuthD.GotErrorInvalidEmailFormat _) -> do
             handleAction $ Log $ ErrorLog "Invalid email format!"
+            handleAction $ AddNotif $ BadNotification "Invalid email format."
           (AuthD.GotErrorAlreadyUsersInDB _) -> do
-            handleAction $ Log $ ErrorLog "Login already taken!"
+            handleAction $ Log $ ErrorLog "GotErrorAlreadyUsersInDB"
+            handleAction $ AddNotif $ BadNotification "Login already taken!"
           (AuthD.GotErrorReadOnlyProfileKeys _) -> do
             handleAction $ Log $ ErrorLog "Trying to add a profile with some invalid (read-only) keys!"
+            handleAction $ AddNotif $ BadNotification "Trying to add a profile with some invalid (read-only) keys!"
           (AuthD.GotErrorInvalidActivationKey _) -> do
             handleAction $ Log $ ErrorLog "Invalid activation key!"
+            handleAction $ AddNotif $ BadNotification "Invalid activation key!"
           (AuthD.GotErrorUserAlreadyValidated _) -> do
             handleAction $ Log $ ErrorLog "User already validated!"
+            handleAction $ AddNotif $ BadNotification "User already validated!"
           (AuthD.GotErrorCannotContactUser _) -> do
             handleAction $ Log $ ErrorLog "User cannot be contacted. Email address may be invalid."
+            handleAction $ AddNotif $ BadNotification "User cannot be contacted. Email address may be invalid."
           (AuthD.GotErrorInvalidRenewKey _) -> do
             handleAction $ Log $ ErrorLog "Invalid renew key!"
+            handleAction $ AddNotif $ BadNotification "Invalid renew key!"
           -- The authentication was a success!
           (AuthD.GotToken msg) -> do
             handleAction $ Log $ SuccessLog $ "Authenticated to authd!"
             H.modify_ _ { token = Just msg.token }
+            handleAction $ AddNotif $ GoodNotification "Authenticated!"
             handleAction $ ToggleAuthenticated (Just msg.token)
 
             sessionstorage <- H.liftEffect $ Window.sessionStorage =<< HTML.window
             _ <- H.liftEffect $ Storage.setItem "user-authd-token" msg.token sessionstorage
 
             handleAction AuthenticateToDNSManager
-          (AuthD.GotKeepAlive _) -> do
-            -- handleAction $ Log $ SystemLog $ "KeepAlive!"
-            pure unit
+          (AuthD.GotKeepAlive _) -> pure unit
     pure unit
 
   -- | Send a received authentication daemon message `AuthD.AnswerMessage` to a component.
@@ -585,6 +620,12 @@ handleAction = case _ of
       _              -> handleAction $ Log $ SystemLog "unexpected message from authd"
     pure unit
 
+  AddNotif n -> do
+    H.modify_ _ { notif = n }
+
+  CloseNotif -> do
+    H.modify_ _ { notif = NoNotification }
+
   Disconnection -> do
     H.put $ initialState unit
 
diff --git a/src/Bulma.purs b/src/Bulma.purs
index 5ec7123..84fc9e2 100644
--- a/src/Bulma.purs
+++ b/src/Bulma.purs
@@ -506,3 +506,19 @@ tab_entry :: forall w i. Boolean -> String -> i -> HH.HTML w i
 tab_entry active name action =
   HH.li (if active then [HP.classes C.is_active] else [])
     [ HH.a [HE.onClick \_ -> action] [HH.text name] ]
+
+delete_btn :: forall w i. i -> HH.HTML w i
+delete_btn action = HH.button [HE.onClick \_ -> action, HP.classes C.delete] []
+
+notification :: forall w i. Array HH.ClassName -> String -> i -> HH.HTML w i
+notification classes value deleteaction =
+  HH.div [HP.classes (C.notification <> classes)]
+         [ delete_btn deleteaction
+         , HH.text value
+         ]
+
+notification_primary :: forall w i. String -> i -> HH.HTML w i
+notification_primary value deleteaction = notification C.is_primary value deleteaction
+
+notification_danger :: forall w i. String -> i -> HH.HTML w i
+notification_danger value deleteaction = notification C.is_danger value deleteaction