Due to a policy of the registry shortly before the expiration date of a gTLD domain (.com/.net/.org/.biz) automated reminder mails will be sent to the domain owner, informing him that the domain is about to be renewed.

For you, the contract data from the customer control panel (can bee seen under "Contract Details") are still valid for the domain contract in this case.

If you want to keep the domain you don't have to take any steps; the renewal will be performed automatically.

Please note in general: As long as you do not cancel the domain contract, it gets renewed automatically.