diff --git a/app/config.py b/app/config.py
index 5fdb7ab3..782f693d 100644
--- a/app/config.py
+++ b/app/config.py
@@ -357,6 +357,7 @@ ALERT_COMPLAINT_TRANSACTIONAL_PHASE = "alert_complaint_transactional_phase"
 ALERT_QUARANTINE_DMARC = "alert_quarantine_dmarc"
 
 ALERT_DUAL_SUBSCRIPTION_WITH_PARTNER = "alert_dual_sub_with_partner"
+ALERT_WARN_MULTIPLE_SUBSCRIPTIONS = "alert_multiple_subscription"
 
 # <<<<< END ALERT EMAIL >>>>
 
diff --git a/templates/emails/transactional/warn-multiple-registration.html b/templates/emails/transactional/warn-multiple-registration.html
new file mode 100644
index 00000000..c3d6c2b1
--- /dev/null
+++ b/templates/emails/transactional/warn-multiple-registration.html
@@ -0,0 +1,17 @@
+{% extends "base.html" %}
+
+{% block content %}
+
+  {% call text() %}
+  Hello,
+{% endcall %}
+
+{% call text() %}
+Your have tried to register multiple times to {{ service }}, and this is against the terms of service of SimpleLogin. Please don't do that anymore.
+{% endcall %}
+
+{% call text() %}
+If you continue registering multiple accounts to a single service we will have to disable your account.
+{% endcall %}
+
+{% endblock %}
diff --git a/templates/emails/transactional/warn-multiple-registration.txt.jinja2 b/templates/emails/transactional/warn-multiple-registration.txt.jinja2
new file mode 100644
index 00000000..b98117e4
--- /dev/null
+++ b/templates/emails/transactional/warn-multiple-registration.txt.jinja2
@@ -0,0 +1,9 @@
+{% extends "base.txt.jinja2" %}
+
+{% block content %}
+Hello,
+
+Your have tried to register multiple times to {{service}}, and this is against the terms of service of SimpleLogin. Please don't do that anymore.
+
+If you continue registering multiple accounts to a single service we will have to disable your account.
+{% endblock %}