The charity's chief executive Paul Goldring will meet Penny Mordaunt, the global development secretary, on Monday after she threatened to withdraw millions of pounds of government funding.
The charity is accused of suppressing information about aid workers hosting sex parties with prostitutes during a 2010 mission to Haiti.
Ms Mordaunt said she had written to all United Kingdom charities that receive aid from the Government and asked them to explain the measures they took to implement safeguarding measures.
She added that Oxfam staff had come forward with concerns about the recruitment and vetting of workers involved in the scandal.
The Times' report was based on sources familiar with the organization's work in Haiti around that time as well as a report summarizing an internal Oxfam investigation into the allegations.
The charity had a fund worth more than $100 million to provide relief supplies and help rebuild Haiti's infrastructure, the Times reported. If any issues arise during recruitment processes - through DBS, references, whistleblowing or even a verbal comment - we would always investigate and take appropriate action.
Oxfam chief executive Mark Goldring apologised on Saturday, saying he was deeply ashamed of Oxfam's behaviour.
During the probe, Oxfam dismissed four staff members and another three resigned, including van Hauwermeiren.
"Through their unacceptable actions, they have undermined the vital, effective and life-changing work carried out by Oxfam, as well as by other aid and humanitarian organisations worldwide".
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Once again, the Garden State happens to sit on the warmer side of the storm and will get a decent soaking of rain , Chabala said. A multi-vehicle crash that closed a stretch of eastbound Interstate 94 near Ann Arbor, but no severe injuries were reported.
"If that organisation does not have the moral leadership to do the right thing and where they have evidence of criminal activity, to pass that information onto the relevant authorities, including prosecuting authorities, that's an absolute absence of leadership".
Everybody - the 25,000 staff and volunteers - are compromised by this, the hundreds of thousands of people who support Oxfam every month are compromised by this, and to everybody I apologise, he said.
"Our approach to this matter would have been different had the full details that have been reported been disclosed to us at the time", the commission said.
Major worldwide charity Oxfam is in hot water with the British government for having sex parties with Haitian prostitutes following the 2010 quake that rattled the nation, killing 220,000 people.
But the charity said it had publicly announced an investigation into the allegations when they surfaced in 2011.
It said Oxfam's leaders had "showed a lack of judgment" in their handling of the matter and their level of openness with the government and commission. Asked if that was a lie, Mordaunt said: "Well, quite".
Ms Mordaunt replied: 'Well, quite'.
The former Secretary of State said that "the reason why Oxfam has landed in this position is because they have not been fully open and transparent about what happened".
In a further warning, she said: "If they do not hand over all the information that they have from their investigation and subsequently to the relevant authorities, including the Charity Commission and prosecuting authorities, then I can not work with them any more as an aid delivery partner".