jacksoncourt010411_02_X17-230.jpgJanet, Randy, Rebbie and Jermaine Jackson have been barred from entering Katherine's Calabasas home, according to a letter allegedly written by Michael Jackson Estate lawyer, Howard Weitzman.

Weitzman, who represents co-executors John Branca and John McClain, reportedly sent the letter to Charles Schultz, TJ Jackson's attorney. The letter states:

    “Given the circumstances of the last two weeks, and in order to protect the children and Mrs. Jackson, the Executors believe that it would not be appropriate to allow the following individuals to enter the residence or its grounds and we instruct the security to preclude the following from entering the residence or the grounds: Randy Jackson and any of his children, Janet Jackson, Rebbie Jackson and any of her children, Jermaine Jackson, his wife and any of his children, Janice Smith, or anyone else who was involved in the recent events that led to Mrs. Jackson’s separation from and inability to communicate with Michael’s children, or any agents or representatives of any of these individuals.

    There will be no other security or drivers allowed on the property except those employed by the Estate of Michael Jackson. Joe Jackson is precluded from entering the property. Howard Mann who is in litigation against the Estate and is working with the Jackson siblings that wrote the “letter” should also not be allowed on the premises."

As for the "letter" being referenced ... it's the one sent to Branca and McClain by Janet, Jermaine, Randy, Rebbie and Tito Jackson ... asking that both men resign as executors of their brother's estate. In the letter, it claims the 2002 will is fraudulent.

Weitzman's alleged letter goes on to say:

    “Of course, Paris, Prince and Blanket, T.J. and his brothers, Tito, Marlon, Jackie and their spouses, current security (hired by the Estate), staff (per T.J.), Meg Lodise, Michael Kane, Sandra Ribera, Parry Sanders, Trent Jackson, you (Charles Shultz) and anyone else authorized by T.J. (other than the Excluded Individuals listed above), may enter and remain on the premises.

    It is imperative to the Estate that from this point forward a safe and appropriate environment be provided for Michael Jackson’s children and his mother as well."

A Jackson family source tells X17online exclusively:

    "What kind of lawyer would deny a mother from seeing her own children. Katherine cried the first two days she came home. She told her assistant, 'They're taking everything from me.' They're denying her from hearing the truth. They're denying her family access to see her and trying to get her in court as fast as possible."

On Friday, a judge appointed TJ Jackson, Katherine's 34-year-old nephew, as guardian of Michael's three children.

Katherine's attorney, Perry Sanders Jr., clarified to X17online, that Katherine will still remain in control of the estate's finances, as well as the day-to-day activities of Paris, Prince and Blanket.

We've reached out to Howard Weitzman for comment, but he has yet to respond.