diff --git a/passerelle/contrib/rsa13/models.py b/passerelle/contrib/rsa13/models.py
index 20feea2e..f80b9d41 100644
--- a/passerelle/contrib/rsa13/models.py
+++ b/passerelle/contrib/rsa13/models.py
@@ -303,7 +303,7 @@ class RSA13Resource(BaseResource, HTTPResource):
                             'email': {
                                 'type': 'string',
                                 'maxLength': 78,
-                                'pattern': '^.*@.*$',
+                                'pattern': '^(.*@.*)?$',
                             },
                             'nom': {
                                 'type': 'string',
@@ -404,7 +404,7 @@ class RSA13Resource(BaseResource, HTTPResource):
                             'email': {
                                 'type': 'string',
                                 'maxLength': 78,
-                                'pattern': '^.*@.*$',
+                                'pattern': '^(.*@.*)?$',
                             },
                             'nom': {
                                 'type': 'string',
@@ -902,7 +902,7 @@ class RSA13Resource(BaseResource, HTTPResource):
                         'properties': {
                             'courriel': {
                                 'type': 'string',
-                                'pattern': '^.*@.*$',
+                                'pattern': '^(.*@.*)?$',
                             },
                             'commentaire': {
                                 'type': 'string',
diff --git a/tests/test_rsa13.py b/tests/test_rsa13.py
index 16d5fe4f..3fbb2470 100644
--- a/tests/test_rsa13.py
+++ b/tests/test_rsa13.py
@@ -207,6 +207,20 @@ def test_platform_referent_post(app, rsa13, url):
     assert response.json == {'err': 0}
 
 
+@mock_response(['/api/platform/11/referent/', {'err': 0}])
+def test_platform_referent_post_empty_mail_and_tel(app, rsa13, url):
+    response = app.post_json(
+        url + 'platform/11/referent/',
+        params={
+            'email': '',
+            'prenom': 'John',
+            'nom': 'Doe',
+            'tel': '',
+        },
+    )
+    assert response.json == {'err': 0}
+
+
 @mock_response(['/api/platform/11/referent/1/', {'err': 0}])
 def test_platform_referent_update(app, rsa13, url):
     response = app.post_json(