Case C-143/07: Judgment of the Court (Fourth Chamber) of 24 April 2008 (reference for a preliminary ruling from the Finanzgericht Hamburg — Germany) — A.O.B. Reuter & Co. v Hauptzollamt Hamburg-Jonas (Agriculture — Regulation (EEC) No 3665/87 — Article 11 — System of export refunds on agricultural products — Condition for the grant of the refund — Refund paid to the exporter after submission of documents forged by its contracting partner — Goods not exported — Conditions for the application of sanctions)