Many banks allow a loan's co-signer to live in a different state, although the purchase process may be prolonged as paperwork is mailed back and forth. Expect to prove your identity to the lender before your approval. Consider the risks associated with co-signing while out of state before you co-sign a loan. Credit Application Process If a dealership or lender allows you to co-sign for a borrower, it likely has to prove your identity before approving your loan. Expect to provide your license number and its expiration date. Also, ensure...