Its former chief executive officer, Ming Yi, is facing charges of forgery, helping to falsify its accounts and defrauding the charity of about $300,000.
A Straits Times report in July said that in the last seven months, Ren Ci collected just $1.1 million, down from the $9.3 million that came in over the same period last year.
With the IPC status, Ren Ci is now able to issue double-tax deductible receipts to donors.
Ren Ci's Chairman, Mr Chua Thian Poh said: 'We are very happy to receive this pieace of news. All the hardwork, dedication and determination by Ren Ci team over the past months have been fruitful.'