回複：H1 Transfer, 前公司拒開本月paycheck

collect evidence showing you did your job before leaving previous company. Evidence includes work you did such as code you wrote (if you were a programmer), emails you communicated with your manager, or some hard copy of your work. The evidence should have date which tells which date you were still working in that company. By the way, it is illegal if you did work for your employer but he refused to pay you. You can sue him (talk to a lawyer if you pay $100 consulting fee but get $1000 check back, or ask the lawyer to write a letter to your employer). I am not really sure if you can contact a government agency (such as department of labor in your state). There may be an agency handling this issue,check on website.