What is a person who agrees to pay the loan if the applicant is unable to pay?

A person who agrees to pay the loan if the applicant is unable to pay is known as a co-signer. The co-signer takes on the legal obligation to repay the loan if the primary borrower defaults, thereby providing the lender with an additional level of security. Co-signers typically have a strong credit history and income, which can help the primary applicant secure better loan terms.