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

Do I need to send diplomas with my application?

No, the company will ask for copies of these, if they are required, at the job interview or on your first day at work. It is wise to have your diploma translated into Dutch or English and to have your qualifications validated.

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

References are not obligatory. It is up to you whether you name referees in your CV. Your new employer can only contact them after you have agreed to this. Personal matters or reasons for resigning are not to be discussed in references.

If proof of good conduct is needed, it should be mentioned in the job advertisement.

When you leave a company, the employer must always give you a certificate. This may simply contain neutral content but must never say anything negative about your personality or your work.