In the case of the Internet Export Declaration Plus (IAA Plus) the handwritten signature is replaced by an electronic certificate created with the Elster programme (which is familiar from VAT returns). In this way all the relevant data (e.g. customs tariff decisions or replies from the customs office of exit) can be checked and safely transmitted via the internet, without any need for paper.
Welcome to the DPD website / Internet Export Declaration Plus (IAA Plus)