HRS §634-1
Who can sue on a written assignment
This section says that if someone gives you a written assignment of a nonnegotiable right to payment, you can sue in your own name. But the person who owes the money can use any defenses or setoffs they had against the original owner, up until they learn about the assignment.
debtors
The statute, as written — Assignee; nonnegotiable chose
The assignee of any nonnegotiable chose in action, assigned in writing, may maintain thereon in the assignee's own name any action which, but for the assignment, might be maintained by the assignor; subject, however, to all equities and setoffs existing in favor of the party liable against the assignor and which existed at the time of the assignment or at any time thereafter until notice thereof was given to the party liable, except as otherwise provided.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.