diff --git a/backend/services/billingService.js b/backend/services/billingService.js
index 6229a000..43b26262 100644
--- a/backend/services/billingService.js
+++ b/backend/services/billingService.js
@@ -51,6 +51,26 @@ class BillingService {
         return candidate;
       }
     }
+
+    // Fallback fuer migrierte/verschobene Workspaces:
+    // Datei ueber den Dateinamen in bekannten Upload-Ordnern suchen.
+    const baseName = path.basename(rawPath);
+    if (!baseName || baseName === '.' || baseName === '/') {
+      return null;
+    }
+    const templateDirs = [
+      path.resolve(process.cwd(), 'uploads', 'billing-templates'),
+      path.resolve(process.cwd(), 'backend', 'uploads', 'billing-templates'),
+      path.resolve(process.cwd(), '..', 'backend', 'uploads', 'billing-templates'),
+      path.resolve(process.cwd(), '..', 'uploads', 'billing-templates')
+    ];
+    for (const dir of templateDirs) {
+      const candidate = path.join(dir, baseName);
+      if (fs.existsSync(candidate)) {
+        return candidate;
+      }
+    }
+
     return null;
   }