"T$3 his was an elaborate and sophisticated fraud, involving multiple parties around the world in different institutions, with a deliberate aim of deception", said EY in a statement to CNBC.
"The management board is of the opinion that continuation is in the best interests of the creditors", it said in a statement.
The parent company performs some central functions for subsidiaries and, apart from a small development branch office, no group companies have filed for insolvency yet, it said.
The FCA said written consent for Wirecard to continue providing payment services was granted on Monday and that restrictions would be lifted by Tuesday.
Wirecard filed for insolvency after its auditor, Ernst & Young, reported €1.9bn, about a quarter of its balance sheet, missing from the company's bank accounts.
The firm is also "in constant contact with the credit card organisations", the statement said. The group of more than a dozen lenders led by ABN Amro Bank NV, Commerzbank AG and ING Groep NV were in negotiations with Wirecard aimed at keeping it afloat and were surprised by the insolvency filing, Bloomberg has reported.
"We are maintaining pressure on the firm to resolve these issues which would allow it to operate under certain conditions", the FCA said.
The hundreds of thousands of users of British subsidiary Wirecard Card Solutions have lost access to their funds, with some taking to Twitter to express their dismay. Wirecard-issued cards operated under e money and payment services regulations and this means the funds held on them is not protected by the Financial Services Compensation Scheme (FSCS).
"A number of new advisers were commissioned to ensure neutrality", it said.
Wirecard's former CEO Markus Braun was detained last week on suspicion of falsifying accounts before being released on bail.