diff --git a/inc/field/checkboxesfield.class.php b/inc/field/checkboxesfield.class.php
index 07cdc072e..eeb7fdde0 100644
--- a/inc/field/checkboxesfield.class.php
+++ b/inc/field/checkboxesfield.class.php
@@ -204,9 +204,19 @@ public function isValidValue($value): bool {
 
       foreach ($value as $item) {
          if (trim($item) == '') {
+            Session::addMessageAfterRedirect(
+               sprintf(__('Empty values are not allowed: %s', 'formcreator'), $this->getTtranslatedLabel()),
+               false,
+               ERROR
+            );
             return false;
          }
          if (!in_array($item, $this->getAvailableValues())) {
+            Session::addMessageAfterRedirect(
+               sprintf(__('This value %1$s is not alowed: %2$s', 'formcreator'), $item, $this->getTtranslatedLabel()),
+               false,
+               ERROR
+            );
             return false;
          }
       }
diff --git a/inc/field/radiosfield.class.php b/inc/field/radiosfield.class.php
index 4026d1179..5d8049ed2 100644
--- a/inc/field/radiosfield.class.php
+++ b/inc/field/radiosfield.class.php
@@ -204,8 +204,18 @@ public function isValidValue($value): bool {
       if ($value == '') {
          return true;
       }
+
       $value = trim($value);
-      return in_array($value, $this->getAvailableValues());
+      if (!in_array($value, $this->getAvailableValues())) {
+         Session::addMessageAfterRedirect(
+            sprintf(__('This value %1$s is not allowed: %2$s', 'formcreator'), $value, $this->getTtranslatedLabel()),
+            false,
+            ERROR
+         );
+         return false;
+      }
+
+      return true;
    }
 
    public static function canRequire(): bool {
diff --git a/inc/field/selectfield.class.php b/inc/field/selectfield.class.php
index 9296b24cc..68e6b402b 100644
--- a/inc/field/selectfield.class.php
+++ b/inc/field/selectfield.class.php
@@ -118,7 +118,16 @@ public function isValidValue($value): bool {
          return true;
       }
       $value = trim($value);
-      return in_array($value, $this->getAvailableValues());
+      if (!in_array($value, $this->getAvailableValues())) {
+         Session::addMessageAfterRedirect(
+            sprintf(__('This value %1$s is not allowed: %2$s', 'formcreator'), $value, $this->getTtranslatedLabel()),
+            false,
+            ERROR
+         );
+         return false;
+      }
+
+      return true;
    }
 
    public function equals($value): bool {