Warning: These people send you a complicated thing that looks like a statement and appears to tell you that your registered domain name will expire in such and such date. The "bill" looks like you need to pay them $30 to keep your domain name.
Read the fine print. "Domain name holders are not obligated to renew their domain name with their current Registrar or with the Domain Registry of America. They are attempting to get you to switch to their domain registry from wherever you originally bought or received your domain name.
This is a scam to get you to pay them when you don't have to. If you bought your domain name from your local ISP or any of a number of other domain registries, you do NOT have to pay these people to keep it.
Further down the "bill" says: "This notice is not a bill, it is rather an easy means of payment SHOULD YOU DECIDE TO SWITCH your domain name registration to the Domain Registry of America."
Don't fall for it and send them any money. Check with your original domain name provider for any fees you need to pay. I'm sure they'll let you know if you owe them for another year.