Hi pnkmcneil,
All hosting accounts are set to renew automatically (unless you previously requested from our billing team that your account does not). When your account has been renewed, you will be sent a receipt automatically via email (a receipt, not the same thing exactly as an invoice however).
If you need an invoice, you can find more details here:
How to Print a Billing Invoice in AMP
If you would like to get a reminder before your account renews, please see:
How to Set a Billing Reminder in AMP
I hope this helps answer your question. Feel free to update your question or post in this page's comments if you have any follow up questions.
Thanks,
- Brad