diff --git a/account_ebics/README.rst b/account_ebics/README.rst
index fbc746a..625aea7 100644
--- a/account_ebics/README.rst
+++ b/account_ebics/README.rst
@@ -40,6 +40,8 @@ The keycode of the licensed version.
 - fintech_register_users
 
 The licensed EBICS user ids. It must be a string or a list of user ids.
+You should NOT specify this parameter if your license is subsciption
+based (with monthly recurring billing).
 
 Configuration
 =============
diff --git a/account_ebics/__manifest__.py b/account_ebics/__manifest__.py
index 23c5b2b..177a0f9 100644
--- a/account_ebics/__manifest__.py
+++ b/account_ebics/__manifest__.py
@@ -3,7 +3,7 @@
 
 {
     'name': 'EBICS banking protocol',
-    'version': '12.0.1.0.3',
+    'version': '12.0.1.0.4',
     'license': 'LGPL-3',
     'author': 'Noviat',
     'category': 'Accounting & Finance',
diff --git a/account_ebics/models/fintech_ebics_register.py b/account_ebics/models/fintech_ebics_register.py
index 5719169..19d53f4 100644
--- a/account_ebics/models/fintech_ebics_register.py
+++ b/account_ebics/models/fintech_ebics_register.py
@@ -21,13 +21,16 @@ fintech_register_users = config.get('fintech_register_users')
 
 try:
     if fintech:
-        fintech_register_users = fintech_register_users \
-            and fintech_register_users.split(',')
+        fintech_register_users = (
+            fintech_register_users
+            and [x.strip() for x in fintech_register_users.split(',')]
+            or None
+        )
         fintech.cryptolib = 'cryptography'
         fintech.register(
-            fintech_register_name,
-            fintech_register_keycode,
-            fintech_register_users)
+            name=fintech_register_name,
+            keycode=fintech_register_keycode,
+            users=fintech_register_users)
 except RuntimeError as e:
     if e.message == "'register' can be called only once":
         pass