Non-applicant want to withdraw a suit on the basis of compromise

Can a non-applicant/non-plaintiff can withdraw a suit on the basis of compromise when plaintiff is not present ? Facts are a joint account has been opened between two persons with either or survivor mode(equal power to operate account), at the time of maturity , joint account holders reinvested the amount with interest , but agent fraudulently kept the part of interest amount and reinvested, on this fraud 2nd joint account holder filed a suit in the court but agent fraudulently made setting with 1st joint holder and withdraw the suit on compromise basis when the case was running at evidence stage, that 1st account holder don’t want to run the case as he received the interest from agent & no disputes is there. While in this suit 1st joint account holder was not applicant/plaintiff but suit was withdrawn misrepresentation & fraud practice of opponent criminal lawyer before the court . My question is,Can a joint account holder who is not a applicant/party in the court,withdraw the suit