Want to confirm total termination of all clauses in previous employment contract.

[PayrollHRGuy]

It isn't documented at length from any credible source. If you know of such a source please feel free to link it.

But I will say one thing. If there is, and I don't believe for a moment that there is, such a program run by the government, your former employer, or aliens, why do you think they would document this in your HR file or even care if you actually signed up for it.