*New legal documents uncovered by TMZ show that Michael Jackson secretly provided financial support to his father Joe Jackson.

In filings from Joe Jackson’s wrongful death case against Dr. Conrad Murray, Michael’s former alleged manager, Leonard Rowe, wrote a sworn statement in which he claims Katherine acted as Michael’s agent, funneling money to Joe for support.

Joe’s lawyer, Brian Oxman, wrote a separate declaration in which he claims he prepared financial documentss for Michael during his 2004 custody battle with Debbie Rowe. In those declarations, Oxman claims Michael disclosed he was giving Katherine $50,000 a month in the early 2000s and later it went up to $66,000. Oxman says Katherine used part of the money to pay for Joe’s living expenses.

The legal docs are being used in the wrongful death case to prove Joe has standing to sue — in other words, he must show Michael had been supporting Joe during his lifetime.