At peopletrace.com they offer you a few different services but all try to give you the same thing to find a loved one friend or someone else that you have lost contact with
The first service is that you can make your own search this gives you access to over 70 million search records these include the electoral roll from 2004 and 2005

Then there is a full trace investigation with contact, this service uses their own very experienced researches to help you fin the person that you are looking for and if found they will contact them, but if they do not find them you will not be charged

The next service is a trace a person but without contact they do a detailed trace using many different search methods but no contact will be made also if they are not found then People Trace