FBI agents raided the luxury lakeside home of mysterious payroll company boss Michael Mann late on Monday following the collapse of his company which cost tens of thousands of people their paychecks.

Half a dozen law enforcement vehicles descended on the house in the tiny town of Edinburg, New York, around 4.30 pm. The agents stayed for about an hour.

Camera flashes could be seen coming from the second story of a massive, half-completed extension to the house which is inside Adirondack Park.

But it is not believed that any arrests were made and it is unclear what investigators removed from the home. The FBI’s Albany office, which is leading the investigation, did not immediately return calls.

The luxury lakeside home (above) of mysterious payroll company boss Michael Mann in Edinburg, New York. The posh, custom-made home is located in Adirondack Park

DailyMail.com was the only media on site at the time of the raid.

Mann, 49, is the elusive president of ValueWise, the parent company of MyPayrollHR, which closed its doors on September 5, leaving people all over the country without their bi-monthly paychecks.

Even now, after massive publicity about the case, no news organization has been able to turn up a photograph of either Mann or his wife, Kim, 48.

Over the weekend the couple strung a rope across the top of the hill leading down to their home and placed buckets across the driveway to deter visitors.

An investigator (above) is seen outside Mann's home late Monday. Half a dozen law enforcement vehicles descended on the house in the tiny town of Edinburg, New York, around 4.30 pm

Camera flashes could be seen coming from the second story of a massive, half-completed extension to the house(above) which is inside Adirondack Park

When DailyMail.com knocked on the door of the home, Kim Mann refused to open it and said her husband would not speak. ‘I’m calling 911. Bye,’ she added.

Michael and Kim Mann moved full-time to the home on the banks of the Great Sacandaga Lake about 18 months ago, after selling their house close to his offices in upstate Clifton Park, New York. The move increased his commute from 15 minutes to nearly an hour.

The custom-made home lists on Zillow for $500,000, a fortune for the remote exclusive area where it was built. It has an unusual design with three wings spreading out from a ‘great room.’ A massive 500-foot triangular deck gives million-dollar views across the lake.

Mann started building the extension for a double garage with a 960 sq. ft. bedroom and bathroom above in September last year. The permit for completion expires next week.

‘He called me in a panic on September 6, saying he might have to sell and I would soon understand why,’ Edinburg’s Building Superintendent Terry Anthony told DailyMail.com. ‘I told him I don’t watch the news.

‘He wanted to know what would happen to the permit if he sold. I told him it applies to the property not the owner.’

An unidentified woman is seen outside the home. Agents spent about an hour at the residence during the raid on Monday. The elusive Michael Mann and his wife Kim have not been photographed since the collpase of ValueWise

Agents spent about an hour at the home on Monday. It is not believed that any arrests were made and it is unclear what investigators removed from the home

Attempts to speak to a dozen workers at the now-shuttered company have not proved fruitful.

The father of one of the now-unemployed workers said his son was told at lunchtime on Thursday, September 5 not to return in the afternoon and to go to the office the following day to retrieve any personal items.

There was no hint that the company was in trouble until September 5 when workers at some 4,000 companies nationwide discovered that direct deposits into their bank accounts had been withdrawn.

Thousands were left without money to pay bills and many were left with negative bank accounts as they had just made monthly rent or mortgage payments.

A Facebook support group for those who have been affected is growing by the day as many workers say they have been left unable to pay their bills or feed their families.

New York Governor Andrew Cuomo vowed to take action, saying: 'The company's reckless actions have left employees across the state with negative bank accounts. They deserve answers.'

California-based Cachet Financial Services, a company that handles direct deposit transactions said some $26 million had been diverted. Codes were changed so funds which would normally go to Cachet were instead sent accounts controlled by Mann’s company.

The custom-made home lists on Zillow for $500,000, a fortune for the remote exclusive area where it was built. It has an unusual design with three wings spreading out from a ‘great room.’ A massive 500-foot triangular deck gives million-dollar views across the lake

When DailyMail.com knocked on the door of the home, Mann's wife, Kim, refused to open it and said her husband would not speak. ‘I’m calling 911. Bye,’ she added

Upstate New York-based Pioneer Bank — which has a branch right next door to MyPayrollHR’s office building — said it potentially stood to lose some $36 million.

MyPayrollHR and ValueWise operated from adjoining second-floor suites — numbers 220 and 240 — in a nondescript office building in Clifton Park.

Since the closing, the nameplate has been unscrewed from the wall outside the offices, although the two companies’ names still appear on the ground-floor directory.

UPS drivers have stuck two notices on the office door informing the company they have been unable to deliver packages.

Tens of thousands of companies use third-party payroll processors to pay their workers.

How it is supposed to work is MyPayrollHR enlists the services of an automated clearing house - in this case Cachet - to withdraw a sum from an employer's account.

That sum is placed into a holding account and is then distributed by the clearing house into an employee's personal bank account.

If a mistake is made, the amount can be withdrawn from the employee's account.

The situation involving MyPayrollHR is believed to have started last month when the company instructed Cachet to withdraw about $26 million from employers.

MyPayrollHR and its owner, ValueWise, operated from adjoining second-floor suites — numbers 220 and 240 — in a nondescript office building (above) in Clifton Park, New York

MyPayrollHR, which is owned by ValueWise, enlists the services of an automated clearing house to withdraw a sum from an employer's account. That sum is placed into a holding account and is then distributed by the clearing house into an employee's personal account

It was supposed to then be put into the holding account.

Cachet's general counsel, Wendy Slavkin, told TechTarget that it didn't happen because MyPayrollHR had somehow manipulated the account numbers.

The clearing house claims it is a victim of fraud in the MyPayrollHR scandal.

'MyPayrollHR manipulated the account numbers in that electronic file so that the money was taken out of the employer's account and put into an account controlled by MyPayrollHR, not a Cachet settlement account, as it should've been,' Slavkin said.

When Cachet automatically tried to access the MyPayrollHR accounts it came back as frozen. But the money had already been taken out of Cachet's holding account and distributed to the employees as their paychecks.

'Now all of a sudden Cachet is out $26 million because it's effectively made the payroll for all these companies,' Slavkin said.

Cachet, due to its standard protocol, said they immediately started withdrawing the amounts already distributed to employees to claim back their money.

Slavkin was the last person known to have spoken to Mann. She was hoping to have a conference call with him and Pioneer Bank and when she called Mann said he would have to call back in 15 minutes. He never did and hasn’t responded to any calls since.