<p>Dear {$client_name},</p><p>This is a notice to remind you that you have an invoice due on {$invoice_date_due}. We tried to bill you automatically but were unable to because we don't have your credit card details on file.</p><p>Invoice Date: {$invoice_date_created}<br>Invoice #{$invoice_num}<br>Amount Due: {$invoice_total}<br>Due Date: {$invoice_date_due}</p><p>Please login to our client area at the link below to submit your card details or make payment using a different method.</p><p>{$invoice_link}</p><p>{$signature}</p>