Financial creditors must file claims on Form C, operational creditors on Form B, and other creditors on Form F, according to the regulations. The Insolvency and Bankruptcy Board of India (IBBI) has issued a Form F to facilitate the filing of claims by creditors other than financial and operational creditors. Purchasers of flats may submit a claim using Form F. If a flat buyer is unsure about his or her creditor status as a financial, operational, or other creditor, he or she may file a claim in any of the three forms; IRP will not exclude claims filed in the erroneous form.