Usually the ads are not verified but the publishing site. Especially free ads like craigslist. Actually, one of my listings was put by someone else on craigslist as a rental. One of the agents from my office found it and let me know. Craigslist took it down before I was able to see it myself.
Unfortunately, the rental scam people are running rapid. They are on all the internet sights. At some point the sight host are going to need to start charging the rental adds and collect their information. Until that is done, it is going to continue.
Work with a local agent who will help you sort them out. Most of us here are not property managers and therefor it is not our main focus, but many of do help if to avoid one person avoid being taken advantage of.