Scam. He uses the details on the scanned in WU doc you send him to withdraw the money.
The other scam to look out for is where someone rents property then advertises it for rent claiming it is their property to rent.
They show you around, you like the place so sign a contract, get the keys and pay deposit/retainer/first months rent.
Come move in day you and ten other people all turn up having rented the same room..
Also - if you do indeed have his mobile number, some baiting using a withheld number and some abuse is definately called for.