The proof that justifies and supports the preferential origin of the goods along with preferential arrangements signed by the European Community with different countries, is generally the A. TR movement certificate, EUR-1. Now, in the majority of these arrangements a simplified system for the proof of origin is foreseen, either declared by an invoice declaration or another commercial document. To obtain the authorization for the invoice declaration, SOLDEVILLA ADUANA, SL makes all its resources, know-how and experience available in order to achieve that status.