diff --git a/deploy/patches/37/0009-fix-dont-crash-if-no-email-events-for-the-record.patch b/deploy/patches/37/0009-fix-dont-crash-if-no-email-events-for-the-record.patch
new file mode 100644
index 0000000..7ff0370
--- /dev/null
+++ b/deploy/patches/37/0009-fix-dont-crash-if-no-email-events-for-the-record.patch
@@ -0,0 +1,22 @@
+From 26b366735f4e5cb1daa180973abd54a4102d5405 Mon Sep 17 00:00:00 2001
+From: Marc Calvo <mcalvo@gisce.net>
+Date: Tue, 27 Aug 2024 10:13:27 +0200
+Subject: [PATCH] fix dont crash if no email_events for the record
+
+---
+ poweremail_signaturit/poweremail_mailbox.py | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/poweremail_signaturit/poweremail_mailbox.py b/poweremail_signaturit/poweremail_mailbox.py
+index ef92b27..b9ae780 100644
+--- a/poweremail_signaturit/poweremail_mailbox.py
++++ b/poweremail_signaturit/poweremail_mailbox.py
+@@ -60,6 +60,8 @@ def update_poweremail_certificate(
+         for certificate in res.get("certificates", []):  # Hauria de ser nomes 1 pero bueno
+             for event in certificate.get("events", []):  # Ens guardem tots els events que ha tingut el email
+                 email_events.append((event['created_at'], event["type"]))
++        if not email_events:
++            return False
+         # Si un dels events es que s'ha arrivat al estat get_email_opened_state, ja en tenim prou amb aixo
+         if final_certificat_state in [x[1] for x in email_events]:
+             certificat_state_to_write = final_certificat_state
diff --git a/poweremail_references/poweremail_mailbox.py b/poweremail_references/poweremail_mailbox.py
index 1530b8e..3e870a4 100644
--- a/poweremail_references/poweremail_mailbox.py
+++ b/poweremail_references/poweremail_mailbox.py
@@ -76,16 +76,6 @@ def restrict_write_callback_from_previous_emails(self, cursor, uid, ref, func, v
             restrict = False
         return restrict
 
-    def get_certificate_email_ids_with_same_ref(self, cursor, uid, ref, context=None):
-        if context is None:
-            context = {}
-        email_ids = self.search(cursor, uid, [
-            ('certificat', '=', True),
-            ('reference', '=', ref)
-        ], context=context)
-        email_ids.sort(reverse=True)
-        return email_ids
-
     def create(self, cursor, uid, vals, context=None):
         if context is None:
             context = {}