I haven't bought multi-family with Section 8, but have bought single family homes with Sec 8 tenants. Tedjr is correct about the lease coming with the tenant. Contact the case worker(s) for appropriate paperwork to transfer after you have a signed contract. You'll also want to know about the previous inspection and when the next one will take place. The case worker probably won't tell you this as you are not yet the owner, so make your offer contingent on receiving copies of the lease and inspection reports. You can then call to verify info with the case worker. It may take a few weeks to transfer after the closing, so try to time the closing accordingly, or arrange for 1-2 month's rent to be held in escrow. Otherwise the check will go to the previous landlord, and you have no recourse to get paid.