Is this a scam? I was hired to work for an investor using quitclaim deeds

[Karen Closkey]

I saw an ad on Craigslist that they need someone to do private investigator type work. I answered and the person told me they work for private investors. They are trying to get ahold of a homeowner to buy his second house which is in foreclosure. I would get $400 once the homeowner signs a quitclaim deed and 0 if he does not proceed. 

Could this be a scam of some kind? Not only am I worried I won’t get paid because I have no contract with the investors but I don’t want to be a party to a scam to hurt the homeowner. I have to say I work for the investor, not that I am a process server or courier. I am not a realtor or lawyer. I am concerned the check could be fake or the homeowner never gets paid. What should I do? I have a phone number and name of a lady and email but she said the investors don’t have a company name. 

[Nathan Gesner]

Quote from @Karen Closkey:

I don't think it's a scam, but it's most likely a waste of your time. What if you spend six hours working on this and come up empty? All work, no pay.

If you want to make money, stop trying to chase get-rich-quick schemes or working with shady businesses. Find a second job or a legit side hustle, do the work, earn the pay.