Complaints concerning a product or service purchased from the Danish Technological Institute may be submitted to Konkurrence- og Forbrugerstyrelsens Center for Klageløsning (Competition and Consumer Authority's Center for Complaint Resolution), Carl Jacobsen Vej 35, 2500 Valby. You can file a complaint to Center for Klageløsning (Center for Complaint Resolution) via www.forbrug.dk.The European Commission's online complaint portal can also be used when filing a complaint. This is particularly relevant if you are a consumer residing in another EU country. Complaints can be lodged here - http://ec.europa.eu/odr. Please enter our e-mail address kurser@teknologisk.dk when filing a complaint.