We've written about domain ownership before and unfortunately still come up against issues where companies think they own their domains yet the registered details do not reflect this. Mostly this is just a registration problem but it can cause issues when you move your domain to another provider or the registered address/email contact info goes out of date. To check whether your domain is registered to you and has the correct details, you can use a service such as Who Is to check, just enter your domain or web address to see what the registered details are.
Having come across 2 recent occasions in quick succession of potential customers asking specific questions about who actually owns their website and domain as they had heard and experienced stories of web designers disappearing leaving them with no access to their domain or website we thought we'd provide some details on how you can take some steps to protect yourself from this situation. One recent customer also advised of approaching a web design company for a quote to create them a new website, the quote came in too high so they approached us via a recommendation and when we looked into it, the previous company had actually purchased the domain names they wanted and now wont return their calls nor agree to see them. They are effectively holding the domains to ransom!