There are lots of websites on the internet and most of them are just 'advertising' sites, so they are all much of a muchness. Some sites do go that extra length to give guests a little security, such as this site. Every home advertised on here has to be verified every six months, so that at least gives you the peace of mind the villas are genuine. There are some beautiful homes to choose from and the benefit of this site is that the owner may be active on the forums, so you can chat and get to know them through posts on here, as well as privately. Have a look at the homes using the 3 links above.

If you explain your concerns to a villa owner, I am sure they would be happy to work with you to put your mind at ease and prove they are operating legally. There are links they can send you to verify their license but, like you have found, some are reluctant to give the address prior to payment.

We've had several guests who have been wary of booking online and have sent them details of our management company so they can ask them questions, plus contact details for recent guests so they can chat with them. As already mentioned, just build up a good relationship with your owner - communication is the key.

You should be provided with a contract to sign to say you are in agreement with the lease/terms and conditions - this will protect both you and the villa owner should there be any issues and I wouldn't advise renting a home that doesn't provide you with at least a basic agreement. The villa owner will also need the name of every guest that will staying on the property.