We see various queries, in Blogger Help Forum: How Do I?, about domain registration, after it's too late.
My blog now displays a search page! Have I been hacked?or maybe
My blog is showing content that my kids should not see!
The possibilities, for renewing a domain registration after expiration, will depend upon how the domain registration was originally purchased.
Domains purchased directly from a registrar - whether using eNom, GoDaddy, or a third party registrar, will have to be renewed directly from the registrar - and renewal after expiration will depend upon registrar policy.
Once you purchase domain registration from a registrar, you are on your own.
If you do not renew registration on time, depending upon the registrar, the domain may be changed to point to a domain parking server, where the registrar will serve ads. Some registrars will serve ads which you, or your readers, won't appreciate.
If the domain registration has expired, and the domain was purchased from Blogger / Google, you may be able to submit late payment, and renew now.
If your original charge fails and you’re unable to resolve the form of payment issue within 7 days, you may still be within the grace period for renewals. If you’re still within 19 days of the renewal date, you can try again using any Google Wallet account by visiting http://www.google.com/a/cpanel/domain/renew-domain/primary-domain-name, where primary-domain-name is the domain name you are trying to renew.
In some cases, once late payment has been processed, your registration may resume, with no long lasting ill effects. In other cases, you may end up having to setup the DNS addresses.
If you wait past the grace period, you will have to pay more than the original registration fee. If you wait past the redemption period, you have to pay substantially more - if the domain is available.
The best renewal experiences, of course, start with renewal before expiration.