19 February 2016
To my knowledge no section of company act mandates written off debtors,
But The board of directors have accountability to the shareholders to demonstrate why the debts have become bad.So generally a Board resolution should be prepared demonstrating detailed way what are steps taken by company to recover debt and why it is written off now as bad debt.(it may be mandatory if authorised to do so by articles of association)
But in case of Unrealised export debtors, below procedure is mandatory before written off https://rbi.org.in/Scripts/NotificationUser.aspx?Id=7886&Mode=0