Use

The accountants use our innocent sister Jean Nader to make the $545,820 April 21, 1992, cash payment to the estate disappear.

I try to bring attention to the coming payment of $545,820 to the Estate but the accountants put innocent Jean Nader between me and them and give her instructions that shut me out.

"I do not know what your problem is, but in the future, please address all correspondence to Mrs. Nader."
(From Edward White to Anthony O'Connell, April 4, 1992)