diff --git a/card.php b/card.php
index 8ab5d19..b4aaef2 100644
--- a/card.php
+++ b/card.php
@@ -180,8 +180,13 @@ if ($action === 'dismiss_tracking' && $user->hasRight('mahnung', 'write')) {
 // Belege scannen: pdftotext + Pattern-Matching
 if ($action === 'scan_belege' && $user->hasRight('mahnung', 'write')) {
 	require_once DOL_DOCUMENT_ROOT.'/custom/mahnung/class/mahnungtrackingpattern.class.php';
+	require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
 
-	$scanDir = $upload_dir;
+	$scanRef = dol_sanitizeFileName($mahnung->ref);
+	$scanDir = (!empty($conf->mahnung->multidir_output[$mahnung->entity])
+			? $conf->mahnung->multidir_output[$mahnung->entity]
+			: $conf->mahnung->dir_output ?? (DOL_DATA_ROOT.'/mahnung'))
+		.'/'.$scanRef;
 
 	$patternService = new MahnungTrackingPattern($db);
 	$suggestions = array();