Employer letter: job title, duties, pay and start date
Recent pay slips, if already working for the employer
Your background
Degree certificates and transcripts
Résumé
Experience letters from past employers
Tips for the day
Know your job duties and your employer well, and say them simply.
Answer about your degree and why it fits the job.
Keep answers short and truthful.
Embassies can ask for different papers. Always follow the instructions on your own embassy's official page and appointment letter. Unofficial; not legal advice.