If you receive a notice in the mail that looks like a bill and urges you to renew your domain name, it is a scam. A ruse from Domain Registry of America to get you to switch. Please do a search on Google to verify this. I quote from Wikpedia:
“In 2003, the Federal Trade Commission reached a settlement with the company for practices such as transferring domain registrations to their service under the guise of domain renewal, a practice known as domain slamming, and having hidden fees. Despite this action, the company still sends mass direct mail to consumers resembling invoices with “domain name expiration notice” in bold print. Targets for the company’s mass mailings are known to be in Europe, Australia, New Zealand, Canada, and the United States with information obtained in violation of their ICANN registrar agreement.”
Don’t do business with them!