Marimex is authorized to act as a Customs Warehouse, storing merchandise with the suspension of duty payments and under fiscal and customs control. Customs clearance of cargo can be partially done, where duties are paid only for those quantities nationalized.

The service allows imported cargoes to enter the country without exchange coverage and remain under this condition for a period of one year, with the option of having this period extended for another year and, under special conditions, for up to three years.