Luxembourg - diplomas, references, recommendation or proof of good conduct

Do I need to send diplomas with my application?

You are advised to send a copy of your diplomas with the application

Should I supply references, letters of recommendation or proof of good conduct?

There are no general rules regarding the use of references or letters of recommendation. Normally the job advert mentions the documents or references that are required. It is often advised to bring copies of these documents to the interview. This is also true for the need for proof of good conduct.