diff --git a/modules/caissedepargne/browser.py b/modules/caissedepargne/browser.py
index 25298febf706d7dc5aaaff035933ccae8186e49a..65ba427bb4a29936a5d754a70e3dcfca6a79d3c4 100644
--- a/modules/caissedepargne/browser.py
+++ b/modules/caissedepargne/browser.py
@@ -705,6 +705,13 @@ def do_new_login(self, data):
         if self.response.headers.get('Page_Erreur', '') == 'INDISPO':
             raise BrowserUnavailable()
 
+        pre_login_status = self.page.get_wrong_pre_login_status()
+        if pre_login_status == 'AUTHENTICATION_FAILED':
+            # failing at this step means no password has been submitted yet
+            # and no auth method type cannot be recovered
+            # corresponding to 'erreur technique' on website
+            raise BrowserUnavailable()
+
         authentication_method = self.page.get_authentication_method_type()
         self.do_authentication_validation(
             authentication_method=authentication_method,
diff --git a/modules/caissedepargne/pages.py b/modules/caissedepargne/pages.py
index 153f78dc760c317e9e4ae1506e38e19e805c9341..dee24d03203de19b39e8eff009f41d7e09bbba7c 100644
--- a/modules/caissedepargne/pages.py
+++ b/modules/caissedepargne/pages.py
@@ -120,6 +120,17 @@ class AuthenticationMethodPage(JsonPage):
     def get_validation_id(self):
         return Dict('id')(self.doc)
 
+    def get_wrong_pre_login_status(self):
+        if (
+            not Dict('step/validationUnits', default=None)(self.doc)
+            and not Dict('validationUnits', default=None)(self.doc)
+        ):
+            # 'validationUnits' informs about auth method
+            # not having any is faulty for the connection
+            status = self.doc['response']['status']
+            assert status in ('AUTHENTICATION_FAILED',), 'Unhandled status when checking if authentication method is informed: %s' % status
+            return status
+
     @property
     def validation_units(self):
         units = Coalesce(