The acceptance of anonymous campaign contributions is illegal and unless returned to the original contributor, must be given/sent to the Hawaii Election Campaign Fund. It is also illegal to anonymously give money to a candidate.
http://ags.hawaii.gov/campaign/files/2014/03/HRS.pdf
§11-352 False name contributions prohibited.
(a) No person shall make a contribution to any candidate, candidate committee, or noncandidate committee in any name other than that of the person who owns the money, property, or service.
(b) All contributions made in the name of a person other than the owner of the money, property, or service shall escheat to the Hawaii
election campaign fund. [L 2010, c 211, pt of §2]
§11-353 Anonymous contributions prohibited.
(a) Except as provided in subsection (d), no person shall make an anonymous contribution to any candidate, candidate committee, or noncandidate committee.
(b) A candidate, candidate committee, or noncandidate committee shall not knowingly receive, accept, or retain an anonymous contribution, or report such contribution as an anonymous contribution, except as provided in this section.
© An anonymous contribution shall not be used or expended by the
candidate, candidate committee, or noncandidate committee, but shall be returned to the contributor. If the contributor cannot be identified, the contribution shall escheat to the Hawaii election campaign fund.
(d) This section shall not apply to amounts that aggregate to less than $500 that are received from ten or more persons at
the same political function. The receipt of
these contributions shall be disclosed in a report filed pursuant to sections 11-333 and 11-335. [L 2010, c 211, pt of §2]