Where, in an action against two or more joint contractors, joint and several contractors, or partners, service is perfected on only part of the contractors or partners and the officer serving the writ returns that the others are not to be found, the judgment obtained shall bind, and execution may be levied on, the joint or partnership property as well as the individual property, real and personal, of the defendant or defendants who have been served with a copy of the process. However, the judgment shall not bind nor shall execution be levied on the individual property of the defendant or defendants not served with process.