回複：what document do I need if I leave the company?

I want to find anothe job because my current company won't help me do EB-2 application. I already got EB-3 Labor approved and I-140 approved. What document do I need to take with me if I leave my current employer so I can keep my priority date?

-The copy of the EB3 I-140 approval notice. If you can not get it, a copy of the I-140 receipt is also OK, at least you need to have the reeipt#.