So they just handed you 4 grand.

Ok.

So it's a check...probably a cashier's check, from Bank A in New York, with a fake phone number...mailed from P.O. box 123ABC...which would be the first tip off since bank's can't do that and have to have a physical address.

If it was that easy to get 4 grand then I'd have 8.

Just trying to save you the time...because when it goes though your account....and it gets returned...don't come back with a cryface...because I told ya so.