diff --git a/docs-web/src/main/java/com/sismics/docs/rest/resource/ShareResource.java b/docs-web/src/main/java/com/sismics/docs/rest/resource/ShareResource.java
index c85d5586..417a26a9 100644
--- a/docs-web/src/main/java/com/sismics/docs/rest/resource/ShareResource.java
+++ b/docs-web/src/main/java/com/sismics/docs/rest/resource/ShareResource.java
@@ -55,7 +55,7 @@ public class ShareResource extends BaseResource {
     public Response add(
             @FormParam("id") String documentId,
             @FormParam("name") String name) {
-        if (!authenticate()) {
+        if (!authenticate() || principal.isGuest()) {
             throw new ForbiddenClientException();
         }
 
@@ -119,7 +119,7 @@ public class ShareResource extends BaseResource {
     @Path("{id: [a-z0-9\\-]+}")
     public Response delete(
             @PathParam("id") String id) {
-        if (!authenticate()) {
+        if (!authenticate() || principal.isGuest()) {
             throw new ForbiddenClientException();
         }
 
diff --git a/docs-web/src/main/webapp/src/app/docs/controller/Login.js b/docs-web/src/main/webapp/src/app/docs/controller/Login.js
index dc1fc09d..eb7e3d92 100644
--- a/docs-web/src/main/webapp/src/app/docs/controller/Login.js
+++ b/docs-web/src/main/webapp/src/app/docs/controller/Login.js
@@ -28,9 +28,10 @@ angular.module('docs').controller('Login', function(Restangular, $scope, $rootSc
       });
 
       if($stateParams.redirectState !== undefined && $stateParams.redirectParams !== undefined) {
-        $state.go($stateParams.redirectState, JSON.parse($stateParams.redirectParams)).catch(function(){
-          $state.go('document.default');
-        });
+        $state.go($stateParams.redirectState, JSON.parse($stateParams.redirectParams))
+          .catch(function() {
+            $state.go('document.default');
+          });
       } else {
         $state.go('document.default');
       }
diff --git a/docs-web/src/main/webapp/src/app/docs/controller/document/DocumentView.js b/docs-web/src/main/webapp/src/app/docs/controller/document/DocumentView.js
index 9a5fee8b..4a731ed4 100644
--- a/docs-web/src/main/webapp/src/app/docs/controller/document/DocumentView.js
+++ b/docs-web/src/main/webapp/src/app/docs/controller/document/DocumentView.js
@@ -3,7 +3,7 @@
 /**
  * Document view controller.
  */
-angular.module('docs').controller('DocumentView', function ($scope, $state, $stateParams, $location, $dialog, $uibModal, Restangular, $translate) {
+angular.module('docs').controller('DocumentView', function ($scope, $rootScope, $state, $stateParams, $location, $dialog, $uibModal, Restangular, $translate) {
   // Load document data from server
   Restangular.one('document', $stateParams.id).get().then(function (data) {
     $scope.document = data;
@@ -111,10 +111,13 @@ angular.module('docs').controller('DocumentView', function ($scope, $state, $sta
     var title = $translate.instant('document.view.shared_document_title');
     var msg = $translate.instant('document.view.shared_document_message', { link: link });
     var btns = [
-      {result: 'unshare', label: $translate.instant('unshare'), cssClass: 'btn-danger'},
       {result: 'close', label: $translate.instant('close')}
     ];
 
+    if ($rootScope.userInfo.username !== 'guest') {
+      btns.unshift({result: 'unshare', label: $translate.instant('unshare'), cssClass: 'btn-danger'});
+    }
+
     $dialog.messageBox(title, msg, btns, function (result) {
       if (result === 'unshare') {
         // Unshare this document and update the local shares
diff --git a/docs-web/src/main/webapp/src/partial/docs/document.view.html b/docs-web/src/main/webapp/src/partial/docs/document.view.html
index b8873a32..d019a27f 100644
--- a/docs-web/src/main/webapp/src/partial/docs/document.view.html
+++ b/docs-web/src/main/webapp/src/partial/docs/document.view.html
@@ -50,7 +50,7 @@
     </h1>
 
 	  <p ng-show="document.writable">
-	    <button class="btn btn-sm btn-info" ng-click="share()">
+	    <button class="btn btn-sm btn-info" ng-click="share()" ng-show="userInfo.username != 'guest'">
         <span class="fas fa-share"></span> {{ 'share' | translate }}
       </button>