Very likely a scam. As a broker here in NY, I don't know any building owners that require payment thru Western Union. At the start of a lease, the first month's payment and security deposit are most often paid by certified checks directly to the landlord.
I would avoid this one.... more
The new owner is obligated to all existing leases. If the apartment is not rent stabilized than he is not obligated to renew the lease but as long as the lease has not expired you may stay in the apartment.... more