At PatentRenewal.com we created a failsafe renewal flow for handling renewal payments in time.
We can, of course, imagine scenarios where you are late with your payment.
When the invoice due date has passed and we did not receive the due payment, you will receive 3 automated payment reminders by email. If we do not receive any payments after the automated reminders, you will get an email containing a Credit Note for the unpaid invoice.
We do our best to renew your patents despite late payment, please note that renewal can fall into the surcharge period, and this can increase costs.
Related:
What are the email notifications sent during the renewal flow?