There are just some companies out there that won’t stop when it comes to spam emails and taking advantage of others. You need to recognize what is spam email and what is not.
When you register your domain, you set up an account with a registrar. Once a year or several years is what you pay to reserve that domain. You should get a reminder once when renewal is due directly from that registrar. There are however companies that send out emails to renew your domain that simply are spam to collect your payment information and get your money. Do NOT pay this. If you have any questions, feel free to contact us so we can check it out.
Below is a sample of an email that you would get. As you can see the price is raised much higher than your agreement is with your current registrar.
Spam domain email