It depends.

If your criminal record is sealed or expunged, then it is hidden so that the public cannot see it in any official government records. Emphasis is on "the public." Police and court officials can still see it. If you apply for a government job that involves security, then your security clearance investigation will find it.

Ok, so the public cannot see your criminal record in government records. But, expungement does to delete the information from private records. If a private company (like a credit agency) recorded the information in their database before it was expunged, then the information is still publicly available from the private database.

The Fair Credit Reporting Act puts some limits on how long the Credit Agency can retain and publish certain information. You may want to look that up on the internet to see how long they can keep your criminal record on file.

Finally, you are entitled to a free Credit Report on yourself, once per year. Just ask for it from the big three credit agencies: Experian, Transunion, and Equifax. You may need to state that you were denied credit or denied a job in order to qualify for the fee credit report, but they never verify that statement, and they have to give you the report. Then you know what is on the reports, and you can submit a correction of any errors.
I got this information from BackgroundSearch.com