A. The court may order, upon request of any interested party, that the child to be adopted shall be referred to by a fictitious name in all proceedings before the court, if such would be in the best interest of the child.

B. If the court, by order, authorizes the use of a fictitious name, the real name of the child shall be kept in a sealed envelope in the court file and shall not be opened except on order of the court after good cause has been shown.