All of the domains registered with them/transferred to FastComet are with Enabled Auto-Renewal by default. This means that an Invoice for its renewal will be issued and charged on the Card saved on file, thus renewing your domain for the next period automatically. If you no longer need a domain name and want to disable its auto-renewal, that is fine, here is how it is done.
You log in to your client area and follow the below path:
> Domains
> My Domains
> Manage domain
> Tools
> Auto-Renew