The Financial Regulator’s Registrar of Credit Unions, Brendan Logue, in a private and confidential letter to the board of Mitchelstown credit union, warned: "A run on members’ savings took place last year and it is clear that the credit union would have difficulty surviving a repeat of this. You advised us that no contingency plan exists to deal with any of the potential threats to the credit union and this is a matter of great concern."

When contacted by the Irish Examiner Mr Logue said: "There are some credit unions like Mitchelstown whose risk profile is higher than the average. However, these are fewer than 10 in number, out of a total of 419 in the Republic of Ireland. Consequently members should have no reason to be concerned about the safety and security of their savings or about the solvency or liquidity of their credit unions."

Mr Logue wrote to the board of the credit union, the 17th biggest in the State, on February 17, following a crisis meeting a day earlier.

Credit union chairman Kevin O’Flynn told the Irish Examiner he was not commenting on the situation as "it is an internal matter for the board".

Mr Logue told the board at the private meeting it is entering a period of potential instability. "This has arisen mainly because of the dysfunctional operation of the board over recent years and has caused a serious loss of confidence by members in the credit union." He told the credit union by letter that he is appointing an "independent inspector" to review its €35m loan book because of concerns about the administration and lending functions and the "adequacy of the provision for bad and doubtful debts".

He has identified a number of specific issues which he believes "now threaten the financial stability of the credit union". Loan arrears were rising sharply. "It is a matter of concern that at 30 September 2008, four of the top five loans were in arrears. Subsequent to that date significant new loans were advanced, three of which were in the region of €250,000... the board did not seem to be aware of the issuance of these loans," Mr Logue said it his letter.

Losses on investments of close to €65m are increasing and Mr Logue said he has been informed these could hit €4.6m by the end of the current financial year.

He said it is unlikely a dividend will be paid again this year.

Mr Logue said the appointment of a new manager "appears to have fallen into confusion, arising from disputes between directors as to the appropriate procedure to be adopted".

He directed the branch to cease all business lending and to curtail all other lending to 50% of the net increase in savings each month.

He has also directed the credit union to appoint a new manager, who is "independent of any sectional interest" and who holds a recognised accountancy qualification by March 31.