<p>Dear [CustomerName],</p><p>This is a notice to remind you that you have an invoice due on [DueDate]. 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: [InvoiceDate]<br>Invoice #[InvoiceNo]<br>Amount Due: [AmountDue]<br>Due Date: [DueDate]</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>[InvoiceLink]</p><p>[Signature]</p>