The Situation to Dad: See You in Court!

5/17/2011 4:00 AM PDT

The Situation to Dad: See You in Court!

The Situation just fired a warning shot across the bow of his loud-mouthed dad -- in the form of an email announcing Sitch's intent to sue pops ... ASAP!!!

Sources connected to la famiglia ... tell TMZ the Situation's lawyer sent the email to Frank Sorrentino -- aka The Confrontation -- warning of a lawsuit and an emergency injuction to shut down that website where Dad blasts Sitch.

Frank's rep says they're not taking down the website -- and they're not threatened -- especially since, he claims, the email referred to a "law suit."

Spelling counts ... even for a grown-ass man who calls himself The Confrontation.