To entitle an award to be enforced according to the provisions of this chapter, it must be made in writing, and be signed by the arbitrators making the same and who concur therein. The arbitrators shall attach to the award the articles of submission, the notice served on the parties, with indorsements of service, and, if the parties appear, that fact should be noted in the award itself; and they shall give a duplicate of the whole to each of the parties to the controversy, and the duplicates shall each be treated as originals.