Are you allowed, to write in your site or say that you sell something from EU, if you have a business ?

In your country, are you allowed, to write in your site or say that you sell something from EU if you have a business ?

For example :

This product is made in EU.

In Romania, i didn't personally encountered in malls or any places, romanian products made in Romania, which has or had "This product is made in EU" message.