diff --git a/lib/cartodb/controllers/template_maps.js b/lib/cartodb/controllers/template_maps.js
index 8efb722d..21f19931 100644
--- a/lib/cartodb/controllers/template_maps.js
+++ b/lib/cartodb/controllers/template_maps.js
@@ -44,11 +44,7 @@ TemplateMapsController.prototype.create = function(req, res) {
         },
         function addTemplate(err, authenticated) {
             assert.ifError(err);
-            if (authenticated !== 1) {
-                err = new Error("Only authenticated user can create templated maps");
-                err.http_status = 403;
-                throw err;
-            }
+            ifUnauthenticated(authenticated, 'Only authenticated users can get template maps');
             if ( ! req.headers['content-type'] || req.headers['content-type'].split(';')[0] != 'application/json' )
                 throw new Error('template POST data must be of type application/json');
             var cfg = req.body;
@@ -77,12 +73,7 @@ TemplateMapsController.prototype.update = function(req, res) {
         },
         function updateTemplate(err, authenticated) {
             assert.ifError(err);
-
-            if (authenticated !== 1) {
-                err = new Error("Only authenticated user can list templated maps");
-                err.http_status = 403;
-                throw err;
-            }
+            ifUnauthenticated(authenticated, 'Only authenticated user can update templated maps');
             if ( ! req.headers['content-type'] || req.headers['content-type'].split(';')[0] != 'application/json' )
                 throw new Error('template PUT data must be of type application/json');
             template = req.body;
@@ -115,12 +106,8 @@ TemplateMapsController.prototype.retrieve = function(req, res) {
             self.serverOptions.authorizedByAPIKey(req, this);
         },
         function updateTemplate(err, authenticated) {
-            if ( err ) throw err;
-            if (authenticated !== 1) {
-                err = new Error("Only authenticated users can get template maps");
-                err.http_status = 403;
-                throw err;
-            }
+            assert.ifError(err);
+            ifUnauthenticated(authenticated, 'Only authenticated users can get template maps');
             tpl_id = templateName(req.params.template_id);
             self.templateMaps.getTemplate(cdbuser, tpl_id, this);
         },
@@ -156,12 +143,8 @@ TemplateMapsController.prototype.destroy = function(req, res) {
             self.serverOptions.authorizedByAPIKey(req, this);
         },
         function updateTemplate(err, authenticated) {
-            if ( err ) throw err;
-            if (authenticated !== 1) {
-                err = new Error("Only authenticated users can delete template maps");
-                err.http_status = 403;
-                throw err;
-            }
+            assert.ifError(err);
+            ifUnauthenticated(authenticated, 'Only authenticated users can delete template maps');
             tpl_id = templateName(req.params.template_id);
             self.templateMaps.delTemplate(cdbuser, tpl_id, this);
         },
@@ -188,12 +171,8 @@ TemplateMapsController.prototype.list = function(req, res) {
             self.serverOptions.authorizedByAPIKey(req, this);
         },
         function listTemplates(err, authenticated) {
-            if ( err ) throw err;
-            if (authenticated !== 1) {
-                err = new Error("Only authenticated user can list templated maps");
-                err.http_status = 403;
-                throw err;
-            }
+            assert.ifError(err);
+            ifUnauthenticated(authenticated, 'Only authenticated user can list templated maps');
             self.templateMaps.listTemplates(cdbuser, this);
         },
         function prepareResponse(err, tpl_ids){
@@ -394,6 +373,14 @@ function finishFn(app, res, description, okResponse) {
     };
 }
 
+function ifUnauthenticated(authenticated, description) {
+    if (authenticated !== 1) {
+        var err = new Error(description);
+        err.http_status = 403;
+        throw err;
+    }
+}
+
 function templateName(templateId) {
     var templateIdTokens = templateId.split('@');
     var name = templateIdTokens[0];