Péter, must be something temporary:
https://ec.europa.eu/taxation_customs/vies/#/vat-validation
"
Due to specific upgrade works to be executed, the VIES on the Web
application may not be accessible at all times during the following
timeslot: 13/09/2023 21:00 CET - 14/09/2023 03:00 CET.
Apologies for any Inconvenience.
"
El 12/9/23 a las 16:29, Péter Takács escribió: