Yes.
No, but if the appeal is favorable to the SSA they can recover the overpayment amount via garnishment of income.
Yes. It is the employee's responsibilty to ensure their salary is correct.
I've had an unemployment overpayment in Iowa for nearly 10 years and have never had any of my wages garnished.
Your employer is responsible for any over payment of wages. You will need to contact your payroll department to get the problem resolved.
Depends on what the payback is for...if it for an overpayment of wages that were taxed when mistakenly given to you, you would not pay tax on that.
how can I stop a wage garnishment
No. Your credit history isn't determined or affected by an employer's paycheck; it's affected by your amount of credit and the balances you carry, as well as your debt payment history. Your employer can report you to the police, in which case you'd have to prove you were unaware you were being overpayed.
There are situations where a California employer can hold an employee's wages. If the employee's wages are being garnished the employer can hold them.
An employer's payroll is what the state determines how much his premiums will be (along with experience factors, etc.), for his payroll taxes. If the state finds the employer is in non-compliance with their requirements they will come down hard on the employer.
Yes - if you used the company credit card, you are liable to repay the amount you spent ! The employer can recover that directly from your wages.
If your employer has not paid you, you can file a complaint with the Better Business Bureau about the unpaid wages.
That will depend on the employment laws in your state. You should consult an attorney in your jurisdiction.