Excise duty collected from buyer must be deposited with Central Government; statutory recovery, adjustment and refund procedures apply. Duties collected from a buyer as representing excise duty, including excess collections and collections on exempt or nil rated goods, must be paid forthwith to the credit of the Central Government; the Central Excise Officer may issue a show cause notice, determine amounts due after representations, and require payment. Amounts so paid are adjustable against final assessment or related proceedings, and any surplus after adjustment is refundable or creditable under the statutory refund mechanism within the prescribed application period.