Originally Posted by thesaints
In truth, if you are H1-B (allowed to work only for the petitioning employer), checks are very strict. For instance, there is no way you could continue to work, even for a single day after the visa expires.
Do you mean legally or practically? Because a sponsored guest worker could quit tomorrow and find work easily: even if they are technically overstayers, they have a visa that has an expiry date in the future, a genuine SS card (marked "employment with DHS approval only" which most employers won't understand) and a raft of genuine state-issued IDs.
I doubt many of them actually do.
Edit: oh, hold on, you're talking about the visa expiring, not the employment being terminated. Well, my point half stands, then.