The fact that you have signed the contract means that you are essentially bound to it, whether or not you have paid money. Therefore, if you do not want to move in, you must end your rental. If you don`t finish your rental agreement correctly, you may still be forced to rent, but your landlord can only receive this money from you if they couldn`t find another tenant for the property, but they don`t have to find someone else. Whether you or your landlord can end the tenancy and how you can end it depends on the type of lease agreement and what your lease says. But back to the policy of the co-signatories: I don`t think they can stop the deal. They should be more than happy to leave with a bail they don`t deserve. I think in court they would even lose bail, and your son can claim that he was under the understanding that he needed a co-signer and that he thought the agreement was not valid. It may be a victim to finish things where they are and not waste everyone`s time, to walk away from bail if they agree to end all collection efforts. Otherwise, I am convinced that they would lose a judge`s decision and therefore have nothing to show for their stubbornness. I sincerely hope that the landlord is not crazy enough to break a lease because he “doesn`t like” the tenant. If there was no reason to terminate the lease, it would be contrary to the agreement. Typically, this means that they have to pay a fee to end the lease prematurely and they may also have to lose their surety.