diff --git a/imio_teleservices_templatetags/__init__.py b/imio_teleservices_templatetags/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/imio_teleservices_templatetags/templatetags/__init__.py b/imio_teleservices_templatetags/templatetags/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/imio_teleservices_templatetags/templatetags/imio_teleservices.py b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
new file mode 100644
index 0000000..4d3dacd
--- /dev/null
+++ b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
@@ -0,0 +1,16 @@
+from django import template
+
+from wcs.qommon import misc
+from wcs.qommon.templatetags.qommon import unlazy
+
+register = template.Library()
+
+
+@register.filter
+def is_valid_belgian_nrn(value):
+    return misc.validate_belgian_nrn(unlazy(value))
+
+
+@register.filter
+def is_strong_authentication(session_user):
+    return bool('_niss' in session_user.verified_fields)