Do I need to send diplomas with my application?
Copies of educational certificates and qualifications usually need to be enclosed, or can be enclosed voluntarily. You can also state that documents will be forwarded later if necessary. It is advisable to bring the original documents to the interview. Proof of linguistic competence, computer skills, documents about work experience and achievements in any competitions you took part in are important.
Should I supply references, letters of recommendation or proof of good conduct?
References are expected. A former employer, lecturer or tutor can write a letter of recommendation or you should give their contacts, so that potential employers can call them and ask for their impression of you. Letters of recommendation are welcome and can be very helpful. If proof of good conduct is needed, it is mentioned in the vacancy.