Ask to read the loan paperwork to find out whether you will get notices and other info from Sallie Mae. I have heard of cosigners and guarantors of loans not finding out there was a problem until there was a demand that they pay off the entire loan in full immediately. I do not know what Sallie Mae's paper work looks like but you will want to know if the loan goes in default and you will want to have the opportunity to cure the default by catching up on past due payments and continuing with monthly payments.