@official_flo Over Scarface-Style Home Security System

Flo Rida‘s Miami mansion is practically Fort Knox … with a complex $58,000 state-of the-art security system — problem is, he’s refusing to pay for it … this according to a new lawsuit.

Flo is being sued by ADT – the largest home security company in the United States — which claims in 2009 it wired up Flo’s home with a system that included dozens of sensors, smoke detectors and at least 27 security cameras.

In the lawsuit, ADT provided a copy of the contract … which was signed by a man named Lee Prince – who is reportedly Flo’s manager.

According to the lawsuit, Flo paid the initial deposit — $19,366.66 — but after the work was completed, he never forked over the remaining $38,733.

Now, ADT wants the money PLUS interest, totaling $47,134.40.

Here’s where it gets crazy — Flo Rida has fired back at the suit … saying he NEVER authorized the work despite Prince’s signature … and claims he doesn’t owe ADT a dime.

A judge has yet to rule.