You can still submit an application without a social security number. The application will include ID verification and a credit report, but Checkr is unable to provide a background check report without a social security number. Please note that an ITIN or a SIN cannot be used in place of a SSN. You can contact the landlord directly to clarify that your application will not include the background check. Landlord contact information can be found on the rental listing, and at the top of your application in your Renter Hub.