Posted: Sun Jan 8, 2023 10:24am
You did not say that you were talking about a UK registered vehicle! As the UK does not have environment stickers it seems that you do not need one:
From the DGT site “Comparing emissions badges across the EU
A number of EU countries have created their own classifications for vehicles based on emissions levels.
In Spain, emissions badges aren't awarded to vehicles registered abroad, because they aren’t needed. If you have a vehicle from another country with an emissions badges scheme (such as Austria, Denmark, France or Germany), you will be considered to have the equivalent Spanish badge.
This link contains information on how categories from different countries correspond to each other. You can use this to determine which Spanish badge is equivalent to yours and work out which traffic restrictions might apply to you, allowing you to drive on Spanish roads with an emissions badge awarded in your country.
NB: This system of equivalent badges only applies to driving in Spain. Other countries will have their own rules. As a result, if you plan to drive your vehicle in Austria, Denmark, France, Germany or any other country with an emissions category system, you should find out in advance whether you need to get a badge for the country where you are travelling and how to do so, as well as the conditions for driving there.”