Your web site has been up and running for a while, and has been very successful. One day you start receiving calls from your clients or customers that your web site is no longer accessible. You call your web hosting company and they tell you the domain name was not re-registered by them and so it is up for sale. If you want the domain name back, you will have to purchase it. How could this happen? I pay for my domain name, but don’t I own it?