from www.tmz.com – Heidi Fleiss is being forced out of her place of business in Las Vegas, TMZ has learned –after the former Hollywood madam allegedly turned the place into a dungheap.

Heidi’s landlord served her with an eviction notice on November 21st — demanding she clear the premises of her dog-grooming business “Dirty Dog Laundry” asap — but we’re told, she hasn’t moved jack.

Sources tell us, the landlord served her because Heidi hadn’t been paying her rent — and worse … she turned the place into a dump.

Heidi tells us, she gave up on the business months ago because she’s planning to move back to L.A. — and handed the place over to a friend … who promised to take care of it.

But clearly, her friend dropped the ball — because we’re told the place is still a giant mess. And the landlord is pissed … telling friends, she’ll clean the place out himself if she has to.