Section 643 - Service; absentee or unidentified parent; curator ad hocA. If the parent against whom a proceeding is instituted cannot be served in accordance with Article 640 or 641, the court shall appoint an attorney at law as curator ad hoc for the parent and service shall be made upon the curator ad hoc.B. Upon appointment of the curator ad hoc, a copy of the letter of appointment shall be forwarded to the department and the district attorney.C. If the father is unidentified, it is not necessary to appoint a curator ad hoc for that parent. The father shall be considered unidentified if the biological father's name is not provided on the birth certificate, there is no presumed father, and no party to the proceedings or the mother, if not a party, is able to provide a first and last name of a putative father or alias sufficient to provide a reasonable possibility of identification and location.Acts 1991, No. 235, §6, eff. Jan. 1, 1992; Acts 2017, No. 239, §1.Amended by Acts 2017, No. 239,s. 1, eff. 8/1/2017.Acts 1991, No. 235, §6, eff. 1/1/1992.