diff --git a/modules/creditmutuel/browser.py b/modules/creditmutuel/browser.py
index e3f199da58d60f64de7d2c6cb6078e6d65159248..8e77bdaa75143efa44c1e31f9628dc09ebf53e41 100644
--- a/modules/creditmutuel/browser.py
+++ b/modules/creditmutuel/browser.py
@@ -59,7 +59,7 @@
     ConditionsPage, MobileConfirmationPage, UselessPage, DecoupledStatePage, CancelDecoupled,
     OtpValidationPage, OtpBlockedErrorPage, TwoFAUnabledPage,
     LoansOperationsPage, OutagePage, PorInvestmentsPage, PorHistoryPage, PorHistoryDetailsPage,
-    PorMarketOrdersPage, PorMarketOrderDetailsPage,
+    PorMarketOrdersPage, PorMarketOrderDetailsPage, SafeTransPage,
 )
 
 
@@ -86,6 +86,7 @@ class CreditMutuelBrowser(TwoFactorBrowser):
     outage_page = URL(r'/fr/outage.html', OutagePage)
     twofa_unabled_page = URL(r'/(?P<subbank>.*)fr/banque/validation.aspx', TwoFAUnabledPage)
     mobile_confirmation = URL(r'/(?P<subbank>.*)fr/banque/validation.aspx', MobileConfirmationPage)
+    safetrans_page = URL(r'/(?P<subbank>.*)fr/banque/validation.aspx', SafeTransPage)
     decoupled_state = URL(r'/fr/banque/async/otp/SOSD_OTP_GetTransactionState.htm', DecoupledStatePage)
     cancel_decoupled = URL(r'/fr/banque/async/otp/SOSD_OTP_CancelTransaction.htm', CancelDecoupled)
     otp_validation_page = URL(r'/(?P<subbank>.*)fr/banque/validation.aspx', OtpValidationPage)
@@ -374,6 +375,10 @@ def check_auth_methods(self):
                 assert self.polling_data, "Can't proceed to polling if no polling_data"
                 raise AppValidation(self.page.get_validation_msg())
 
+        if self.safetrans_page.is_here():
+            msg = self.page.get_safetrans_message()
+            raise AuthMethodNotImplemented(msg)
+
         if self.otp_validation_page.is_here():
             self.otp_data = self.page.get_otp_data()
             assert self.otp_data, "Can't proceed to SMS handling if no otp_data"
diff --git a/modules/creditmutuel/pages.py b/modules/creditmutuel/pages.py
index f07250ba2af96fe85fb1b244d55ec08bc67d46e5..0e84be78091421b762fa90fc2d6455b8133288bf 100644
--- a/modules/creditmutuel/pages.py
+++ b/modules/creditmutuel/pages.py
@@ -193,6 +193,23 @@ def check_bypass(self):
             self.logger.warning('This connexion cannot bypass mobile confirmation')
 
 
+# PartialHTMLPage: this page shares URL with other pages,
+# that might be empty of text while used in a redirection
+class SafeTransPage(PartialHTMLPage, AppValidationPage):
+    # only 'class' and cryptic 'id' tags on this page
+    # so we scrape based on text, not tags
+    def is_here(self):
+        return (
+            'Authentification forte' in CleanText('//p[contains(@id, "title")]')(self.doc)
+            and CleanText('//*[contains(text(), "confirmer votre connexion avec Safetrans")]')(self.doc)
+        )
+
+    def get_safetrans_message(self):
+        return CleanText(
+            '//*[contains(text(), "Confirmation Mobile") or contains(text(), "confirmer votre connexion avec Safetrans")]'
+        )(self.doc)
+
+
 class TwoFAUnabledPage(PartialHTMLPage):
     def is_here(self):
         return self.doc.xpath('//*[contains(text(), "aucun moyen pour confirmer")]')