If a putative father fails to appear after having been personally served with notice, in accordance with the provisions of subdivision 1 of § 8.01-296 or § 8.01-320, alleging that he is the father of a minor child, the court shall proceed in hearing the evidence in the case as provided in Chapter 3.1 (§ 20-49.1 et seq.) of Title 20 as if the putative father were present. The order of the court in any such proceedings shall be served upon the father in accordance with the provisions of Chapter 8 (§ 8.01-285 et seq.) or Chapter 9 (§ 8.01-328 et seq.) of Title 8.01.