If four (4) people signed a promissory note with respect to a bail bond for your son and his girlfriend and you are one of the four (4) the bail bondsman has the option of choosing between all or some of the people who signed the note for repayment. Unfortunately for you, he or she is seeking to collect the money from you.Your recourse is to have the other three (3) people who signed the promissory note with you to reimburse you three-quarters (3/4) of the amount paid by you to the bail bond company. Ultimately the people who needed the bond are responsible for reimbursing you and the other three on the note all monies expended.Good luck.