Can someone that has a co-signer co-sign on a loan?

You have a co-signer and you want to co-sign someone Else's loan. Horrible idea. Co-signing a loan is a good way to pay for a loan that you will get no benefit out of. Do not co-sign any loan. A person that needs a co-signer is a bad credit risk, that is why the lender requires a co-signer. So why would you want to get involved with this. Remember the old saying which is still very true. Never, ever, do business with family or friends. That is a good way to cause family strife and loose a friend.

If you needed a co-signer for your own loan then chances are your credit isn't good enough for another lender to accept you as a co-signer on another borrower's loan. After all, the bank's purpose for requiring a co-signer is to make certain the loan will be paid. They will go after the co-sogner if the primary borrower defaults on the loan.