diff --git a/CHANGELOG.md b/CHANGELOG.md
index 513f5d5936..0278e9d5cb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
+## [Unreleased] - tbd
+
+### Fixed
+ - No invitation mail was sent after successful registration with email address
+
 ## [9.3.0] - 2026-09-16
 
 ### Changes
diff --git a/lib/Service/ShareService.php b/lib/Service/ShareService.php
index 27edf7fd29..9989c9e3db 100644
--- a/lib/Service/ShareService.php
+++ b/lib/Service/ShareService.php
@@ -631,7 +631,7 @@ public function registerGuest(
 		$this->createNewShare(
 			$this->share->getPollIdOrFail(),
 			$user,
-			$user->getEmailAddress() !== '',
+			$user->getEmailAddress() === '',
 		);
 		$this->eventDispatcher->dispatchTyped(new ShareRegistrationEvent($this->share));