Employment Law Questions? Ask an Employment Lawyer.
Yes. did you voluntarily provide the prospective employer with information for your current employer?
There are no federal or state laws in California that prevent a prospective employer from making contact with a current employer. Perhaps requesting that the prospective employer refrain from making contact with any current employers may prevent such contact. However, if if contact is made, it would not be illegal.
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No, the employer cannot defame you and lie about you to other prospective employers. A defamation lawsuit could be filed against the entity that lies about your work or defames you in any way. Here is a treatise of a defamation case: http://thelawdictionary.org/article/when-to-sue-for-defamation-slander-and-libel/
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