suspected of being, false; and c) on the request and if appropriate in the form of official documents from a Member State, information concerning the following matters; (i) the authenticity of any official document produced in support of goods declaration made to Customs authorities of the requesting Member State; (ii) whether goods which were granted preferential treatment on departure from the territory of the requesting Member State; because they were declared as intended for home use in the other Member State, have been duly cleared for home use in the that State; (iii) whether goods imported into the territory of the requesting Member State have been lawfully exported from that of the exporting Member States; (iv) whether goods exported from the territory of the requesting Member State have been lawfully imported into that of the importing Member States and in accordance with the importer’s declaration; and (v) special documents which may be issued by the Customs authorities of the exporting Member State for surrender to the Customs authorities of the importing Member State in order that they may certify that the goods were lawfully exported. 4. Each Member State undertakes, whenever expressly requested by another Member State, to: a) make enquiries, record statements and obtain evidence concerning a Customs offence under investigation in the requesting Member State and transmit the results of the