It is possible, but seems to be very very unusual. I think we've only had two reports of rental fraud on DIS in the last many years---and both had red flags all over the place. One wanted the money by Western Union or some such thing, while the other was offering a Christmas week at $6/point, way too good of a price to be true. At the same time many many transactions are completed successfully each day. As long as you are doing your due diligence, the chances of something like this happening are probably negligible.