The consideration of any such promise, contract, or agreement, need not be set forth, or expressed, in the writing signed by the party to be charged therewith, but may be proved by any other legal evidence.
Haw. Rev. Stat. § 656-2
Consideration need not be in writing
CC 1859, §1054; RL 1925, §2666; RL 1935, §3901; RL 1945, §8722; RL 1955, §190-2; HRS §656-2
Official source: Hawaii State Legislature. Reproduced from public-domain Hawaii statutes; confirm against the official source for the current text. Not legal advice.