Stormont budget: £320m approved without finance minister's consent
Over £320m in spending was approved by three former Stormont Ministers before they left office, without the consent of the Finance Department.
The BBC understands this was done using Ministerial Directions.
The money was approved by Robin Swann, Deirdre Hargey and Naomi Long, shortly before they were removed from their posts on 28 October.
Ministerial Directions are issued when senior civil servants raise questions about departmental decisions.
It is understood civil servants' concerns surrounded the affordability of what the Ministers were proposing in the absence of an agreed Executive budget.
According to the Department of Finance, former Health Minister Robin Swann approved £280m for health expenditure in September. He previously approved £80m of spending in July.
Former Communities Minister Deirdre Hargey approved £22.6m in October to continue the Department's Discretionary Support Scheme which provides financial support to people on low incomes facing hardship, given the current cost of living crisis.
Shortly before she left office in the same month, former Justice Minister Naomi Long approved £20m for legal aid payments in October.
In all three cases former Finance Minister Conor Murphy did not approve the funding.
On Friday, his party, Sinn Féin, said Mr Murphy had provided Ms Hargey with a reasonable expectation that she would receive the necessary funding for her department's scheme.
This was based on a written ministerial statement he had made which stated "should an executive be restored I would recommend an additional allocation to DfC to enable it to meet the unprecedented demand for Discretionary Support Grants, which help the most vulnerable people when faced with a financial crisis".
An Alliance spokesperson said Ms Long's request for funds was to allow for the provision of legal aid to continue.
"Legal aid is a vital public service and there are serious implications for access to justice if we cannot afford to provide it," a statement said.
It added that normal processes were followed in relation to any ministerial direction.
The Ulster Unionist Party has said Mr Swann's ministerial directions include "all of this year's allocations to waiting list initiatives" and to "commencing the delivery of cancer, mental health and substance use strategies".
"At all times Robin Swann`s priority was to protect vital services, despite the political paralysis in the Executive and Assembly," it continued.
"The secretary of state could have and should have intervened earlier to address that critical need."
A draft budget was out for public consultation when the former First Minister Paul Givan resigned and the DUP collapsed the Executive.
The decisions were taken in the absence of an agreed budget by the Executive and at a time when the then-Finance Minister had warned about a massive projected overspend.
It was set at £660m pounds at the time but has since been reduced to £330m.
That money will now be cleared through an advance from the Treasury but the cash will be taken from next year's Stormont budget.
Fourteen Ministerial Directions were issued in total from March until October, five of which came in the final weeks before department ministers left office.
Northern Ireland secretary Chris Heaton-Harris has criticised the decisions taken by Ministers before they left leaving behind a "hole" in the Stormont finances
He has also warned of significant spending cuts in Education as he set a new budget for the Stormont departments.