Freedom Foods is “undertaking further investigations” into possible fraudulent activity after a flood of expiring milk triggered a $60 million write-down, which was revealed a day after the shock departure of the company’s chief executive and chief financial officer.

The $830 million company, backed by the billionaire Perich family, also revealed on Thursday that it would need to book an extra $10 million in bad debts after it combed over its accounts and found invoices that were raised but failed to be credited to the health food company.