Co-signing credit card?

if someone co-signs a credit card application, what should be the address givien. is it the co-signer's or the applicant's (both are living at different address). If the applicant has no credit history do you think there is a chance that the application will be rejected even if the co-signer has good/excellent credit history? does the applicant have to provide address proof apart from the co-signer's?