Thank you very much for your request.
I am a consultant at mbeon and the migration consultancy.
If you paid the fine, there should be no further consequences for you.
Only if penalties are not paid can difficulties and consequences arise.
Enclosed some links with information about "Schwarzfahren"
I hope I was able to answer your questions. You are welcome to ask further questions or visit a counselling centre near you.
Friendly greetings
mbeon caritas
https://***.bussgeldkatalog.org/schwarzfahren/