diff --git a/addons/event_crm/models/event_registration.py b/addons/event_crm/models/event_registration.py
index 994500f26ed..a4940115e01 100644
--- a/addons/event_crm/models/event_registration.py
+++ b/addons/event_crm/models/event_registration.py
@@ -3,7 +3,7 @@
 
 from collections import defaultdict
 
-from odoo import api, fields, models, _
+from odoo import api, fields, models, tools, _
 from odoo.addons.phone_validation.tools import phone_validation
 
 
@@ -195,10 +195,18 @@ class EventRegistration(models.Model):
         )  # CHECKME: broader than just public partner
 
         # mono registration mode: keep partner only if email and phone matches;
-        # otherwise registration > partner. Note that _phone_format has to be
-        # taken into account as it may have side effects on phone formatting
+        # otherwise registration > partner. Note that email format has to be
+        # taken into account in comparison
         if len(self) == 1 and valid_partner:
-            if self.email and valid_partner.email and valid_partner.email != self.email:
+            # compare emails: email_normalized or raw
+            if self.email and valid_partner.email:
+                if valid_partner.email_normalized and tools.email_normalize(self.email) != valid_partner.email_normalized:
+                    valid_partner = self.env['res.partner']
+                elif not valid_partner.email_normalized and valid_partner.email != self.email:
+                    valid_partner = self.env['res.partner']
+
+            # compare phone
+            if valid_partner and valid_partner.phone and self.phone and valid_partner.phone != self.phone:
                 valid_partner = self.env['res.partner']
             if valid_partner and self.phone and valid_partner.phone:
                 phone_formatted = phone_validation.phone_format(
diff --git a/addons/event_crm/tests/test_event_crm_flow.py b/addons/event_crm/tests/test_event_crm_flow.py
index 3a32ea87e7d..c9a74e6e809 100644
--- a/addons/event_crm/tests/test_event_crm_flow.py
+++ b/addons/event_crm/tests/test_event_crm_flow.py
@@ -142,7 +142,7 @@ class TestEventCrmFlow(TestEventCrmCommon):
         })
         for email, phone, base_partner, expected_partner in [
             (False, False, self.event_customer, self.event_customer),  # should take partner info
-            ('"Other Name" <constantin@test.example.com>', False, self.event_customer, self.env['res.partner']),  # same email normalized -> currently not supported
+            ('"Other Name" <constantin@test.example.com>', False, self.event_customer, self.event_customer),  # same email normalized
             ('other.email@test.example.com', False, self.event_customer, self.env['res.partner']),  # not same email -> no partner on lead
             (False, '+32485112233', self.event_customer, self.env['res.partner']),  # same phone but differently formatted -> currently not supported
             (False, '0485112244', self.event_customer, self.env['res.partner']),  # other phone -> no partner on lead