Thank you for trusting your question to JA today. I am a licensed attorney with over a decade of law practice and over 20 years of experience in the legal field. I’m happy to be of assistance.
The employer is legally allowed to say anything true, including giving a bad reference if that is their opinion. They can't make up facts, and if they did that then you should sue them for defamation of character.
As for the personal records, that really depends on what you are talking about. Most of one's personnel file has no confidentiality attached to it at all. Things with your social, bank information or medical records do, but other records do not and it wouldn't be illegal to forward them.
Finally, if you had completed the work necessary for the commission but just hadn't stayed through when they pay, you are owed the commission. You should file a wage complaint with your state's department of labor.
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