You can change the notification email, postal address or phone number of your active professional certificate. The intracommunity VAT number can only be changed in the billing address. To do so, please contact our Customer Service Desk at +(352) 24 550 550.
However, you cannot modify the company name or the email address displayed when you apply an electronic signature using your certificate. If you want a certificate with this new data, you will need to order a new one.