Unfortunately, the person being unpaid now (who is supposed to be forced out) probably means that they are missing. When the person is missing, it can easily happen that they are not paid out before filing for Social Security. If, after this year, they are found/forced out, they are just reported again with a "D".
I know that is the way it's supposed to work. But I've found that reporting the distribution does not necessarily prevent the SSA from telling the participant they still have money in the plan.
You are correct, the SSA is a mess when it comes to telling people that they have assets in an old plan, even when you report them as distributed. But government shortcomings doesn't change our duty to report. It is just a risky position for a TPA to take when it is clearly not supported by rules or regs. In theory, each client they do this for could be on the hook for $5,000 in penalties per return.