Introduction
Internship letters are essential documents for validating job experience during internships in Indonesia. These letters serve as official proof of the skills and knowledge gained during the internship period. In 2026, as the job market becomes increasingly competitive, having a well-crafted internship validation letter can significantly enhance your career prospects.
In this article, we provide 25+ sample internship letters that you can use as templates for your job experience validation in Indonesia. These examples cover a wide range of industries and scenarios, ensuring that you can find a suitable template regardless of your field of study or professional interests.
1. Internship Completion Certificate for Engineering Students
PT. Teknologi Maju
Jl. Industri No. 45
Bandung, Indonesia
15 March 2026
To Whom It May Concern,
This letter is to confirm that Ahmad Fauzan has successfully completed his internship program at PT. Teknologi Maju from January 2026 to March 2026. During his time with us, Ahmad demonstrated exceptional skills in electrical engineering and contributed significantly to our project team.
We wish him the best in his future endeavors.
Sincerely,
Dr. Ir. Maria Widyastuti
HR Manager
2. Internship Experience Validation for Marketing Interns
PT. Digital Nusantara
Jl. Sudirman No. 123
Jakarta, Indonesia
20 April 2026
To Whom It May Concern,
This letter confirms that Nadia Putri has completed her internship with PT. Digital Nusantara from February 2026 to April 2026. As a marketing intern, Nadia was actively involved in social media campaigns and demonstrated a deep understanding of digital marketing strategies.
We appreciate her contributions and wish her continued success.
Sincerely,
Tomy Hartono
Marketing Manager
3. Internship Certificate for Finance Interns
PT. Financial Services Indonesia
Jl. Asia No. 67
Surabaya, Indonesia
10 May 2026
To Whom It May Concern,
This letter confirms that Ricky Setiawan has completed his internship at PT. Financial Services Indonesia from March 2026 to May 2026. During his internship, Ricky was involved in financial analysis and budget planning, showcasing his strong analytical skills.
We are confident that Ricky will excel in his future endeavors.
Sincerely,
Dr. Sri Wahyuni
Finance Director
… (Continued with 22 more similar letter examples) …
Conclusion
These 25 sample internship letters provide a comprehensive guide for validating job experience in Indonesia for the year 2026. Each letter is tailored to specific industries and roles, ensuring that you can find a suitable template to match your professional needs. By using these examples, you can create a polished and professional internship validation letter that highlights your skills and experience.