Independents4Change TD Mick Wallace has launched a website seeking "to uncover possible injustice and malpractice related to Nama".
The Wexford TD has made a series of allegations about the workings of the agency and claims he has more than 40 sources making similar claims.
Mr Wallace said Namaleaks. com is a secure and anonymous whistle blowing platform.
He is advising people who want to leak information to use a public Wifi network.
The advice continues: “Take your personal computer and go to a network that isn’t associated with you or your employer, such as at a coffee shop. Ideally you should go to one that you don’t already frequent.
“Leave your phone at home, and buy your coffee with cash. Choose a coffee shop without security cameras, or a spot within the shop where cameras aren’t recording. Be aware of your surroundings, turn your screen away from curious neighbours.”
Mr Wallace said it will allow for anyone who has been unfairly treated or who has witnessed poor practice to securely pass on the information.
He added: "It is unfortunate that our Government does not want Nama to be accountable to the people of Ireland.
"Much information has already come to our attention, which highlights serious problems in relation to how Nama has operated - there is little doubt but that the best interests of the people of Ireland have not always been served by this State organisation.
“Despite the fact that many worrying issues regarding Nama have been brought to the attention of the Government and the Opposition, on the floor of the Dáil, there remains, a stubborn reluctance to hold Nama to account, or properly address the serious concerns through a Commission of Investigation.”
Mr Wallace said the website " intends to do what Fine Gael, Fianna Fáil and Labour do not want to do, that is, hold Nama to account in the interests of the people of Ireland".
The Independent TD has made a number of allegations about the agency's sale of the Northern Ireland portfolio Project Eagle.
Nama has denied all allegations of impropriety.
Mr Wallace has accused Fianna Fáil of doing a deal with Fine Gael to prevent the establishment of a commission of investigation into the workings of Nama.
Mr Wallace said Micheál Martin and his party have done a u-turn on their stance on this issue and claimed there was no rational to the party’s decision.
Fianna Fáil voted against a Dáil motion proposing the establishment of a commission earlier this year despite tabling a similar one in October last year.
Speaking on The Last Word on Today FM Mr Wallace said: "Fianna Fáil told me they were going to support it but obviously there was some deal done behind the scenes that I don't know about.
“They then said ‘no we don’t want a commission of investigation until all other investigations are complete,’which would be in about three years time.”
Mr Wallace tabled a motion calling for an inquiry to be set up. Fianna Fáil tabled a counter motion citing its serious concern at the allegations but insisted all criminal investigations should be concluded first.
