Currency declaration requirement for passengers mandates form presentation to authorised exchangers and customs endorsement on unencashed exchange. The Currency Declaration Form (CDF) under the Foreign Exchange Management (Export and Import of Currency) Regulations, 2015 prescribes passenger obligations to declare foreign exchange exceeding specified thresholds, to present the form to authorised banks or money changers for conversion or reconversion, and to retain the form as proof for customs at departure if unencashed foreign exchange remains. The form requires passenger identity details and a customs endorsement certifying amounts carried, with banks recording encashment particulars and stamping conversions.