Haw. Rev. Stat. § 431:10C-307: Reimbursement of duplicate benefits.

Whenever any person effects a tort liability recovery for accidental harm, whether by suit or settlement, which duplicates personal injury protection benefits already paid under the provisions of this article, the motor vehicle insurer shall be reimbursed fifty per cent of the personal injury protection benefits paid to or on behalf of the person receiving the duplicate benefits up to the maximum limit.