In university, some semesters ago, I forgot to sign up for a course that also includes a presentation and usually we have to formally request the examination office to sign us up after a deadline.

Anyways, I didn't know that. After the deadline was a weekend and the Monday right after I called the secretary of our institute who is usually responsible for registrations. She said she will sign me up as an exception. I got the registration verification, and my CP one week after.

Here's the problem: In my online curriculum it says that the secretary signed me up on the date when I called her. Usually it's "system" that shows up instead of a name.

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So now I'm anxious and kinda obsessively thinking about what could happen if someone at the examination office finds out what happened and if they could probably make me retake the course? As I am not sure if she even is allowed to do that. But then again if she wasn't, why would she do it, right? There has been no email exchange about this, so I have no proof except the registration verification. Also this happened 3 semesters ago. 

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Anyone got any advise or thoughts? I would appreciate it.