Skye Jerome emailed Mrs Harders' solicitor and business partner Peter Woodhouse on Thursday afternoon, notifying him that she planned next week to withdraw a charge of conspiracy to launder money.

Ms Jerome had previously advised Mr Woodhouse that she intended to withdraw a charge of conspiracy to deal with more than $100,000 in the proceeds of crime when Mrs Harders, 36, appears in court next Monday.

Mr Woodhouse said it had always been the firm's position that "there was insufficient evidence to bring a charge against Bridie in the first place".

"Naturally, we are all very pleased with this outcome for Bridie and it comes as a great relief to her and the Aulich team," he said.

"The defence of Ben's matter continues and we remain hopeful of the same outcome."

Mrs Harders had been accused of illegally conspiring with her firm's founding partner Ben Aulich, Kingston accountant Michael Papandrea and an undercover police operative calling himself Alex Torosian.

Mr Aulich and Mr Papandrea were also charged, and remain before the ACT Magistrates Court accused of conspiracy to launder money.

The 48-year-old lawyer faces a further allegation that he recruited the 54-year-old accountant to engage in criminal activity.

Both men are both pleading not guilty.

Following the pair's arrests in December last year, Detective Superintendent Scott Moller alleged they were "professional facilitators" of organised crime and that they had been plotting to clean "large quantities" of tainted cash using a business.

Few details of the case against Mr Aulich and Mr Papandrea have been aired in court, but it has been revealed that the undercover operative known as Torosian posed as an Aulich client last year for about eight months.

The man is understood to have initially approached the law firm, which is based in Civic, under the pretence of needing legal assistance to recover money he claimed police had unlawfully seized from his family.

Precisely how the elaborate investigation led to charges being laid is yet to be revealed in full, but the court has heard that "Torosian" made secret recordings of numerous conversations with the defendants.

Mr Aulich and Mrs Harders are due to appear in court again this coming Monday, while Mr Papandrea's next appearance is scheduled for April 27.

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