If you list your past employers, yes they ask them if they wish. However most employers are pretty neutral when replying to questions about ex-employees.
ONLY a prospective employer can answer such a question as this.
Yes if the work required is sensitive enough.
There is no uneversal answer to this question. All employers set their own employment guidelines. You will have to check wtih the prospective employer and ask.
A misdemeanor is a crime. It will remain on your criminal record and is permanent. It will be up to your prospective employer as to how serious he views it.
Expunged means removed, therefore the record no longer exist and would not be a factor. If the party had other criminal offenses on record that were not erased then those would appear in background check.
They can ask anything they wish, though there are some limits regarding status that could lead to discrimination. And answers by the former employer may be limited by various privacy statutes, but anything that is a matter of public record can be shared. Most former employers will only confirm the dates of employment and the position(s) held.
Employers that have salaried employees have to be registered with the Social Security administration as an employer - this gives limited ability to access an applicants social security returns - which will have a basic employment record.
They can't ask this question in this manner. A way around may be for the employer that is hiring you to ask the previous employer are you re-hireable. In most cases they only verify dates of employment and salary for legal reasons. This is the general practice.
Passing a criminal background check means that no red flags or criminal records were found in the individual's background. This typically means that the individual has a clean criminal record and meets the employer's criteria for employment.
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You will have to check with your prospective employer(s) to learn the answer to this question.
if it is part of your contract or conditions of employment.