Advise a person who has had a negative experience with a former boss and is considering taking legal action.
"My former boss was a jerk and a bully"
Another thing to look at is if you have entered into a contractual agreement with the former boss and your reason for leaving is from a breech on their side. In certain situations, a breech of contract from one party will nullify the contract entirely.
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Consult an attorney to look at your risks, the $100-$200 investment is a smart expenditure if you're dealing with a vindictive former employer. The attorney can open your eyes to possible risks as well as give you possible direction.
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Good Luck.