Completion certificate
A completion certificate is the document confirming a student finished a course. It usually carries the student's name, the course name, the date and a verification code.
It is not the same as an accredited qualification: it certifies that someone completed your programme, not that a body recognises it.
It still carries weight. It is what students share on LinkedIn, what justifies the price to an employer, and one of the few concrete reasons people finish instead of dropping out halfway.