Government sources have declined to comment on allegations by a whistleblower that the Attorney General failed to respond to correspondence when notified of his findings of alleged tax evasion by senior politicians.

In a file sent to members of the Public Accounts Committee last week, civil servant Gerry Ryan alleged that after being appointed Authorised Officer to investigate the Ansbacher offshore accounts controversy, he uncovered secret accounts held by senior politicians in the 1970s and 1980s.

However Mr Ryan, who still works in the Department of Jobs, Enterprise and Innovation, alleges that his investigation was shut down prematurely by former Progressive Democrats Minister Mary Harney in 2004.

He also alleged that when the current Government took office in 2011, he wrote to Attorney General Máire Whelan outlining his concerns about the failure to fully conclude the investigations into the alleged tax evasion.

He states: "The Attorney General did not reply to the Authorised Officer's letter or acknowledge receipt of the briefing note and letter."

Government sources said that they were precluded from commenting on correspondence in and out of the AG's office as it was confidential and privileged.

However, the sources stressed that an examination of Mr Ryan's disclosures under the new Protected Disclosures or whistleblower legislation would be facilitated.

They said Mr Ryan's witness statement would be forwarded to the Garda Bureau of Fraud Investigation as soon as possible.

Earlier, the Taoiseach said that the Department of Jobs last made contact with the Office of the Attorney General about the controversial dossier in December 2010.

At that time, advice on the matter was sought and a Senior Counsel was appointed to deal directly with the concerns of the civil servant.

Mr Kenny said there had been no contact from the department of the Taoiseach either.

The Taoiseach said the Senior Counsel wrote to the Attorney General in July 2011 and pointed out that he had prepared a witness statement from the civil servant that had been requested by the Garda Bureau of Fraud Investigation.

Mr Kenny said that all of the issues raised had been considered by the Mahon and Moriarty Tribunals, gardaí, Revenue and the Director of Corporate Enforcement.

He said it was his understanding that all the information in the dossier had been sent to the agencies in question.

He said it was important that these matters were teased out and he said he expected the PAC would act in accordance with the legal advice they were seeking at present.

Meanwhile, sources at the Department of Jobs Enterprise and Innovation insisted that Mr Ryan's correspondence to Minister Richard Bruton had been acknowledged.

They stressed that the role of the department was to carry out preliminary investigations, and then to refer matters to agencies like the gardaí and the Revenue Commissioners for full investigation. 

He said independent bodies were used to avoid politicians getting involved.

The sources acknowledged that the referral of Mr Ryan's witness statement had not happened as quickly as it should have, but that it would be referred shortly.

Meanwhile, parts of the cover letter for Mr Ryan's dossier sent to the PAC last week were read out in a case involving Michael Lowry earlier today, as his defence counsel sought to have criminal charges against him dismissed.

The PAC will meet on Wednesday to consider legal advice on how it should proceed.

This is the first referral to the committee of allegations under the new whistleblowing legislation.