Maybe. I guess it's possible there's a EU guideline that has to be implemented by the member states, but hasn't been implemented yet e.g. for me in Belgium.
So the website needs to contain the company registration number, the way it's incorporated and a bunch of other stuff, but not the bank account number afaics.
Though the bank account number does need to be displayed on invoices.
Here's the guidelines (in Dutch): http://www.vbo-feb.be/files/ondernemingsnummer.pdf
So the website needs to contain the company registration number, the way it's incorporated and a bunch of other stuff, but not the bank account number afaics. Though the bank account number does need to be displayed on invoices.