{% load i18n creme_widgets %}
{% with invoice=summary.invoice %}
<div class="card-info-field">
    <div class="card-info-field">
        <span class='card-info-key'>{% translate 'Used by Invoice' context 'billing-credit_note' %}</span>
        <span class='card-info-value'>
            {% if invoice %}{% widget_entity_hyperlink invoice user %}{% else %}—{% endif %}
        </span>
    </div>
</div>
{% endwith %}