Comment by sulam
Re: PIPs, it depends on how they’re used. For stronger managers, who address issues quickly, a PIP (even informal) can be effective at creating behavior change that sticks. However the way many companies practice them, they are simply a formal recognition by HR that things have gotten intolerable. The only way out of one of these other than leaving is to move to another team. Thankfully companies who practice this style of PIP are also usually full of junior managers who are easy to convince that they can “fix” whatever issues have caused the situation to arise.
If its been documented then you're probably on your way out, or you should at least operate as if you are. I don't think a "stronger manager" would put you on an official PIP if they wanted to address the issue quickly. They would probably have a face to face discussion and let you know what the issue is. Nothing else is required.