diff --git a/frontend/src/certs/Registers/index.tsx b/frontend/src/certs/Registers/index.tsx
index 45690e2..242c830 100644
--- a/frontend/src/certs/Registers/index.tsx
+++ b/frontend/src/certs/Registers/index.tsx
@@ -309,7 +309,7 @@ function generateCert(person: Person, register: Register) {
 
     const certCode = register.register_is_preview ? "0000" : register.register_code.toString().padStart(4, "0");
 
-    generator(`${courseN} - ${personFullName}.docx`, {
+    generator(`${courseN} - ${personFullName} [${register.register_id.toString(16).toUpperCase()}].docx`, {
         matpel: null,
         personFullName,
         personDni: person.person_dni.toString(),