Hawaii Revised Statutes Division 1. Government § 398-6

(a) An employer may require that a claim for family leave be supported by written certification.

(b) For the birth of a child, certification shall be issued by a health care provider or the family court. For the placement of a child for adoption with the employee, certification shall be issued by a recognized adoption agency, the attorney handling the adoption, or by the individual officially designated by the birth parent to select and approve the adoptive family.

(c) When leave is to care for a child, spouse, reciprocal beneficiary, sibling, grandchild, or parent who has a serious health condition, certification shall be issued by the health care provider of the individual requiring care. Certification shall be considered sufficient if it provides information as required by the director.