The Privacy Commissioner says he does not think it is acceptable for employers to be able to trawl through people's ACC files.
John Edwards will meet with Accident Compensation Corporation officials on Thursday, following revelations ACC sent sensitive information to prospective employers after its clients signed a privacy waiver form.
ACC's policy of forcing clients to sign the form has been found in breach of the law.
Mr Edwards told Radio New Zealand's Morning Report programme he has also dealt with cases where ACC has mistakenly released information as part of pre-employment checks.
Thursday's meeting will canvas the issue in detail, he said.
"That's one of the things I'd like a bit more information from ACC about today, just the circumstances in which information will be given out to employers in that pre-employment process," he said.
Mr Edwards said he also hopes to learn more about the extent of the problem.