Haw. Rev. Stat. § 443B-9: Collection, attorney's, or commission fees; exception.

(a) A collection agency shall not collect, or attempt to collect, any collection fee or attorney's fee or commission from any debtor; provided that an attorney's fee or commission may be collected after filing of a suit against any debtor and the fee or commission shall not be in excess of twenty-five per cent of the unpaid principal balance. All attorney's fees or commissions collected by a collection agency shall be remitted to the attorney and no portion of the collection shall be retained by the collection agency.

(b) This section shall not prohibit a collection agency from collecting, or attempting to collect, from a debtor, a commission authorized under a contract with the University of Hawaii, a contract with the department of taxation pursuant to sections 231-13 and 231-26, or a contract with the executive office on early learning.