{% if subscriber %}
<p>Really unsubscribe for {{subscriber}}?</p>
<form method="post" action="{{ request.path }}">{% csrf_token %}
    <input type="submit" value="Unsubscribe">
</form>
<p><a href="{% url 'wagtail_newsletter_django_backend:newsletter_subscriber_manage' key=subscriber.key %}">Manage my preferences instead</a></p>
<p><a href="/">Go back to the main site</a></p>
{% else %}
<p>This subscriber does not exist</p>
<p><a href="/">Go back to the main site</a></p>
{% endif %}