"We have immediately contacted Save The Children to establish whether they have any knowledge of and/or hold any records about these reports either at the time of the merger or subsequently and if so to ask them to urgently disclose this information to us", a Charity Commission spokesperson said.
Oxfam was in the country offering relief following a devastating 7.0 magnitude natural disaster that killed more than 200,000 people in 2010.
The charity has issued an "unreserved apology" to the United Kingdom government which has given the charity more than £31m in funding.
Downie was highly critical of Oxfam's handling of the situation, saying that despite being informed of the incidents by staff, the organisation had been "more concerned about the charity's reputation than the people who were exploited". "It was unbelievable. It was insane", the source told the Times about parties at the house.
Organisations including Marks and Spencer and the Duke of Edinburgh's (DofE) Award have also said they are considering their association with the charity.
The rot, in this case, appears to have started at the top.
Evans, who headed a "safeguarding" section responsible for protecting staff and the people Oxfam works with, spoke of frustration that her calls for more support for her team were not taken seriously enough.
Oxfam's internal investigation into the use of prostitutes in Haiti led to the dismissal of four employees and three others being allowed to resign, including van Hauwermeiren.
The statement came after it was revealed that senior Oxfam employees had hired vulnerable locals as prostitutes in crisis zones like Haiti after the 2011 natural disaster.
Former aid worker Amira Malik Miller said he resigned from Merlin, a British emergency relief organisation, in 2004 after an investigation revealed that senior staff had been sleeping with local sex workers.
"Please know that we will learn from this".
The report also highlighted instances of rape, verbal sexual abuse, child pornography and prostitution and trafficking of youngsters, many poor, displaced or orphaned by conflict.
"Powerful people did whatever they wanted and they got away with it", she tells me in a hotel cafe in the capital, kneading her hands anxiously.
Josefine is still too scared to talk freely. "And compels us to take action", she is expected to say.
"People did try [to speak out], there were some good people who tried".
"They let perpetrators go".
Oxfam (aide pictured in Zimbabwe) faces a loss of funding after the scandal.
It is claimed they threw parties with prostitutes at a guesthouse known as the "pink apartments" rented by the charity.
However, Minnie plans to continue charity work outside of the umbrella of Oxfam, concluding, "Though it is unfortunate that after 20 years I am no longer able to advocate and defend through this specific framework, social and economic injustice is more globally prevalent than ever".