diff --git a/list.php b/list.php
index a25ef24a..da0a373c 100644
--- a/list.php
+++ b/list.php
@@ -59,6 +59,10 @@ function getFullName() {
     <button type="button" class="close" data-hide="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
     Failure! Something went wrong, see output below:<br/><br/><pre><span id="err"></span></pre>
 </div>
+<div id="alWarning" class="alert alert-warning alert-dismissible fade in" role="alert" hidden="true">
+    <button type="button" class="close" data-hide="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+    At least one domain was already present, see output below:<br/><br/><pre><span id="warn"></span></pre>
+</div>
 
 
 <!-- Domain List -->
diff --git a/scripts/pi-hole/js/list.js b/scripts/pi-hole/js/list.js
index 1ac0e294..530a3b3b 100644
--- a/scripts/pi-hole/js/list.js
+++ b/scripts/pi-hole/js/list.js
@@ -140,23 +140,35 @@ function add(arg) {
     var alInfo = $("#alInfo");
     var alSuccess = $("#alSuccess");
     var alFailure = $("#alFailure");
+    var alWarning = $("#alWarning");
     var err = $("#err");
+    var warn = $("#warn");
     alInfo.show();
     alSuccess.hide();
     alFailure.hide();
+    alWarning.hide();
     $.ajax({
         url: "scripts/pi-hole/php/add.php",
         method: "post",
         data: {"domain":domain.val().trim(), "list":locallistType, "token":token},
         success: function(response) {
-          if (!wild && response.indexOf("] Pi-hole blocking is ") === -1 ||
+          if (!wild && response.indexOf(" already exists in ") !== -1) {
+            alWarning.show();
+            warn.html(response);
+            alWarning.delay(8000).fadeOut(2000, function() {
+                alWarning.hide();
+            });
+            alInfo.delay(8000).fadeOut(2000, function() {
+                alInfo.hide();
+            });
+          } else if (!wild && response.indexOf("] Pi-hole blocking is ") === -1 ||
                wild && response.length > 1) {
             alFailure.show();
             err.html(response);
-            alFailure.delay(4000).fadeOut(2000, function() {
+            alFailure.delay(8000).fadeOut(2000, function() {
                 alFailure.hide();
             });
-            alInfo.delay(4000).fadeOut(2000, function() {
+            alInfo.delay(8000).fadeOut(2000, function() {
                 alInfo.hide();
             });
           } else {