Any person, partnership, corporation or business trust may file a bankruptcy. If the debtor ( person or entity who owes the money) files a petition to start the bankruptcy, it is a voluntary bankruptcy. If the creditors (people or entities to whom the money is owed) file a petition against a debtor to start the bankruptcy, it is an involuntary bankruptcy. If an involuntary case is filed, the debtor has a specific number of days in which to contest the petition and contend it should not be in bankruptcy.