Originally Posted by Reverserbucket
I know of few FE CPL's that are authorised by more than one EU NAA (they do exist though).
I suppose you refer to the previous process of Examiner briefing, which required an examiner of one state to receive a briefing before testing a student of another state.
This requirement does not exist anymore. Any examiner may check, test or assess (EASA jargon) any student. There is an EASA examiner difference document which is kept up to date on the EASA website that explains the process.
The EASA website has always been a mess and will probably be a mess forever, so I cannot find a permanent link to an up to date document, I believe the latest is
https://easa.europa.eu/system/files/...on_06_2015.pdf