diff --git a/lib/Models/StatisticsForms.php b/lib/Models/StatisticsForms.php
index d1ea664195..033102f895 100644
--- a/lib/Models/StatisticsForms.php
+++ b/lib/Models/StatisticsForms.php
@@ -2,14 +2,21 @@
 
 namespace MailPoet\Models;
 
+/**
+ * @deprecated This model is deprecated. Use MailPoet\Statistics\StatisticsFormsRepository and respective Doctrine entities instead.
+ * This class can be removed after 2021-10-02
+ */
+
 class StatisticsForms extends Model {
   public static $_table = MP_STATISTICS_FORMS_TABLE; // phpcs:ignore PSR2.Classes.PropertyDeclaration
 
   public static function getTotalSignups($formId = false) {
+    self::deprecationError(__FUNCTION__);
     return self::where('form_id', $formId)->count();
   }
 
   public static function record($formId, $subscriberId) {
+    self::deprecationError(__FUNCTION__);
     if ($formId > 0 && $subscriberId > 0) {
       // check if we already have a record for today
       $record = self::where('form_id', $formId)
@@ -29,4 +36,24 @@ class StatisticsForms extends Model {
     }
     return false;
   }
+
+  /**
+   * @deprecated This is here for displaying the deprecation warning for properties.
+   */
+  public function __get($key) {
+    self::deprecationError('property "' . $key . '"');
+    return parent::__get($key);
+  }
+
+  /**
+   * @deprecated This is here for displaying the deprecation warning for static calls.
+   */
+  public static function __callStatic($name, $arguments) {
+    self::deprecationError($name);
+    return parent::__callStatic($name, $arguments);
+  }
+
+  private static function deprecationError($methodName) {
+    trigger_error('Calling ' . $methodName . ' is deprecated and will be removed. Use MailPoet\Statistics\StatisticsFormsRepository and respective Doctrine entities instead.', E_USER_DEPRECATED);
+  }
 }