It is advisable to begin searching for an internship position several months before you wish to start working, as many employers place job advertisements and vacancies well in advance. Especially for internships with ministries, government departments, research organizations, foundations and companies, these places of work will typically post vacant positions and internship advertisements on their websites and on job-search platforms. Application processes can differ depending on what is required (for instance certificates, letters of recommendation, letters of motivation); these requirements are listed in the job advertisement or internship posting.