Hello,
I forgot to pay the Winter semester 20/21 fee and paid it on 12 October. But I received a letter saying I will have to pay 30 euros along with the semester fee. I received this letter late because I was out of town. Now, I paid only the 30 euros separately, as I have already paid the semester fee on October 12. Is this fine? Because the letter said I will have to pay the 30 euros along with the semester fee.