diff --git a/assets/css/pretendo-auth.css b/assets/css/pretendo-auth.css
index 1eb5953..0c31312 100644
--- a/assets/css/pretendo-auth.css
+++ b/assets/css/pretendo-auth.css
@@ -42,4 +42,14 @@ body footer .content {
 .card .content .lowText {
     text-align: right;
     color: #707070;
+}
+
+.error {
+    background-color: #eea9a9;
+    border-left: 3px solid #d83434;
+    padding: 1em;
+    color: rgba(0, 0, 0, 0.7);
+}
+.error.hide {
+    display: none;
 }
\ No newline at end of file
diff --git a/assets/js/auth.js b/assets/js/auth.js
index 88aa60d..4badf65 100644
--- a/assets/js/auth.js
+++ b/assets/js/auth.js
@@ -12,7 +12,9 @@ function postAjax(url, data, success) {
 }
 
 function showErrorPopup(errorText) {
-	console.log(errorText)
+	console.log(errorText);
+	document.getElementById('errorBox').innerHTML = errorText;
+	document.getElementById('errorBox').classList.remove('hide');
 }
 
 function login() {
diff --git a/views/login.hbs b/views/login.hbs
index 21b6c76..ac270cf 100644
--- a/views/login.hbs
+++ b/views/login.hbs
@@ -12,6 +12,7 @@
             <div class="content">
                 <p class="txt-highlight">ERROR</p>
                 <h1 class="txt-title small">{{ locale.login.card.title }}</h1>
+                <div id="errorBox" class="error hide"></div>
                 <form method="POST">
                     <label for="email">{{ locale.login.card.email_text }}</label>
                     <input type="text" class="hasLabel" id="email_input" name="email">
diff --git a/views/register.hbs b/views/register.hbs
index 20efab8..a42add7 100644
--- a/views/register.hbs
+++ b/views/register.hbs
@@ -14,6 +14,7 @@
             <div class="content">
                 <p class="txt-highlight">{{ locale.register.card.caption }}</p>
                 <h1 class="txt-title small">{{ locale.register.card.title }}</h1>
+                <div id="errorBox" class="error hide"></div>
                 <form method="POST">
                     <label for="email">{{ locale.register.card.email_text }}</label>
                     <input type="text" class="hasLabel" id="email_input" name="email">