HRS §527-8
Capacity to make or cancel a transfer on death deed
This section says that the mental ability you need to sign or cancel a transfer on death deed is the same as the mental ability you need to sign a will. It does not explain what that ability is or set any other rules.
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The statute, as written — ‑8] Capacity of transferor
The capacity required to execute or revoke a transfer on death deed is the same as the capacity required to execute a will.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.