All they need is your name and DOB. They ask about past landlords and their contact info.They ask your tax statement, income paystubs and employment letters. For most apartments, you'll need to provide some information, such as your social insurance number, to help the landlord do a credit check. A note about your social insurance number (SIN) for a rental credit check. Doing a background check without a Social Security number from a rental can often be done. Carry out a credit check. The lessor only needs the prospective lessee's full name, address and date of birth. To do a credit check the landlord will need your: full name; current address; date of birth or your Social Insurance Number (SIN). Rental Application and Credit Check Form.