I'm a Realtor and a real estate investor and I've never heard of it. It smells awfully fishy, though. You buy the house and some company pays you monthly installments. For what? To buy it from you? Or to rent it? Presumably, though, they're saying they'll cover your monthly mortgage with their payments.
That can work in certain cases--a sandwich lease-option, for example. Though most such techniques don't work on new/recent purchases. And a lot of people lost a lot of money on preconstruction sales in Florida and Las Vegas that promised exactly that sort of arrangement. You'd buy their newly constructed condos (or in some cases single-family homes) and they'd guarantee payments for 12-24 months. Problem is, the properties were terribly overpriced, and when the time ran out (for those communities where the developer didn't go bankrupt first), people were left with hugely overpriced properties that they couldn't rent.
Again, post a link to provide us more information, and we'll give you a better evaluation.
But at this point--since you "haven't got all the information on how it works"--I can promise you that no one can assure you that it "would be safe to take a chance on."
Post the link.
Hope that helps.