Have a vacant apartment in Brooklyn that I've listed for $1700 - a fair price for a 2 bedroom duplex. An early 20-year-old (one student/pt worker one full time worker) and her friend came to see the place and loved it and took an application to fill out - they wanted to put a deposit on it but I suggested that we wait until credit approval comes in. Anyways, that's all normal. What's odd is that the working individual asked if she could pay six months in advance, if approved. I asked her why and she said that she has the money saved up and that it would be easier on her to get it out of the way while she has the money. I'm getting a big red flag - should I be concerned? Of course the usual credit/background/eviction check will take place but should I be concerned if her report comes out positive? My immediate thought was "funds acquired through possibly illegal ways!"