what contact details of the responsible person must appear on my website

Name, address and email address of one identifiable party

The website must show who the responsible business operator for the product is, with name, postal address and an electronic means of contact such as an email address. This is not simply a general "contact" form or a customer service mailbox: it concerns the party designated under the EU regulation as the point of contact for product safety, and that party must be traceable by name and address from the location where the product is offered for sale.

Who that party is follows from the cascade in the regulation: first the manufacturer in the EU, if not present then the importer, if absent then the authorised representative, and as a last resort the fulfilment service provider. One of these parties must always be identifiable — without a responsible business operator with traceable contact details, a product may not be offered for sale. For anyone selling under their own name or brand this is directly relevant: anyone who puts their own brand on a purchased product is themselves considered a manufacturer and thus bears that obligation themselves, even if manufacturing is completely outsourced. A distributor who resells products of another brand without making any changes to them is not required to display this contact information on their own website as the name and address of the manufacturer or importer if these have already been provided elsewhere in the supply chain — the obligation then lies with the party designated as the responsible business operator, not with every link in the chain that resells the product.

Where this follows from: Article 19 and Article 16

Article 19 of Regulation (EU) 2023/988 sets out the information that must be visible when selling at a distance, including name, postal address and electronic means of contact of the responsible business operator. Article 16 of the same regulation describes who that responsible business operator is and in what order the cascade of manufacturer, importer, authorised representative and fulfilment service provider is followed. The NVWA explains on its page on product safety and the GPSR how these obligations are enforced in practice. What other information besides contact details must appear on the website is covered under the information required on the product page; anyone unsure which role their own situation falls under will find a starting point at the distinction between manufacturer, importer and distributor.