diff --git a/lib/Form/Block/BlockRendererHelper.php b/lib/Form/Block/BlockRendererHelper.php
index 2deadec1de..7dd72729b1 100644
--- a/lib/Form/Block/BlockRendererHelper.php
+++ b/lib/Form/Block/BlockRendererHelper.php
@@ -191,6 +191,12 @@ class BlockRendererHelper {
             ? $this->wp->escAttr(trim($block['params']['value'])) : '';
   }
 
+  public function getFieldIsRequired($block = []): bool {
+    return (isset($block['params']['required'])
+            && strlen(trim($block['params']['required'])) > 0)
+            ? !empty($block['params']['required']) : false;
+  }
+
   public function getInputModifiers(array $block = []): string {
     $modifiers = [];
 
diff --git a/lib/Form/Block/Checkbox.php b/lib/Form/Block/Checkbox.php
index 3850482bd9..41aa9fefd6 100644
--- a/lib/Form/Block/Checkbox.php
+++ b/lib/Form/Block/Checkbox.php
@@ -40,10 +40,15 @@ class Checkbox {
     );
 
     $selectedValue = $this->rendererHelper->getFieldValue($block);
+    $isFieldRequired = $this->rendererHelper->getFieldIsRequired($block);
 
     foreach ($options as $option) {
+      $hiddenValue = $isFieldRequired ? '1' : '0'; // Mandatory Fields can not be Empty
+      $html .= '<input type="hidden" value="' . $hiddenValue . '"  name="' . $fieldName . '" />';
+
       $html .= '<label class="mailpoet_checkbox_label" '
         . $this->rendererHelper->renderFontStyle($formSettings) . '>';
+
       $html .= '<input type="checkbox" class="mailpoet_checkbox" ';
 
       $html .= 'name="' . $fieldName . '" ';