The present study aims at the investigation of the transaction status of the second lawyer assuming unauthorized agency in the laws of Iran and England. The study has been carried out in a descriptive-analytical form. The primary issue of the research is investigating the conditions of agency delegation to a third party and the limits of his or her authorities and investigation of the outcomes and responsibility limits with such an assumption as damages incurred by delegating agency to a third person. The results indicated in regard of the agency conditions that the principal is also held responsible for all of the legal actions performed by the second lawyer for they are all conducted based on a trusted relationship and stemming from a lawyer’s authorization.