IPOB made the disclosure in a statement issued on Thursday by its head of directorate, Chika Edoziem.
According to the statement, the account served as a “worldwide” platform for members of the group to pay their monthly contributions.
Edoziem said IPOB closed the account after it received a report from the bank that some “yet to be identified persons” accused it of fraudulently operating the account.
The statement reads; “That the leader of the Indigenous People of Biafra worldwide, Nnamdi Kanu, authorised the opening of the IPOB USA, families were instructed to pay in their monthly contributions.
“That this same USA national account was also designated by our leader as the account for ESN worldwide contributions.
“Following a report to the bank by yet to be identified persons that this account is fraudulent, the bank requested that the account be closed.”