Hi {{ user.first_name|default:user.email }},
Invoice #{{ invoice_number }} has been assigned to you{% if assigned_by %} by {{ assigned_by.first_name }} {{ assigned_by.last_name }}{% endif %}.
Invoice Title: {{ invoice_title }}
Hi {{ user.first_name|default:user.email }},
Invoice #{{ invoice_number }} has been assigned to you{% if assigned_by %} by {{ assigned_by.first_name }} {{ assigned_by.last_name }}{% endif %}.
Invoice Title: {{ invoice_title }}