Are there official documents confirming the completion of training courses?

Official proof of course completion is usually issued by educational institutions or platforms that conduct these courses. In the context of Python, these can be certificates from online schools, universities, or companies such as Coursera, Udemy, Stepik, and others.

Such certificates confirm that a person has completed the course and mastered a certain material. However, their recognition depends on the employer and the specifics of the course — not all certificates have the same value.

If it is about formal education, then diplomas and certificates of secondary education are official documents. In the case of online courses, certificates with a unique code or a link for authenticity verification.