diff --git a/src/components/forms/letter-generator.tsx b/src/components/forms/letter-generator.tsx
index c16e289..e8af797 100644
--- a/src/components/forms/letter-generator.tsx
+++ b/src/components/forms/letter-generator.tsx
@@ -50,6 +50,7 @@ export function LetterGenerator() {
   const [subject, setSubject] = useState("");
   const [body, setBody] = useState("");
   const [date, setDate] = useState(new Date().toISOString().slice(0, 10));
+  const [certifiedMailNumber, setCertifiedMailNumber] = useState("");
   const [template, setTemplate] = useState<FormTemplateConfig | null>(null);
 
   useEffect(() => {