Hello, I am new in the forum. I would like to ask for your guidance on a possible penalty fare or fare evasion that happened to me two weeks ago. Sorry for my English, it is not my first language. Returning from abroad, arrived at Luton airport, border official told me that I had to do quarantine because I was returning from a country that was not exempt. From the airport I took the bus to Luton city, train station. At Luton train station, I bought a general ticket 14.10 which is a bit more expensive than the off-peak 13.90, I don't know when is the peak or off-peak time and last year I got a penalty fare and I didn't want to buy the wrong ticket, I prefer spend a bit of more money than have another problem regarding fares. I selected the ticket to Cricklewood because it is closer to my house, cheaper and I only have to take a bus or simply walk to my house. I could not see the Cricklewood stop on the screens and I asked a guard in the station how should I go to Cricklewood. She told me that there was no direct train to Cricklewood that I had to change in St Alban city. I caught the first train stopping in St Albans city. However, I missed the St Alban stop which connected me with Cricklewood, I got off at the next stop which is St Pancras International, which is further from my house, so my option was to take the underground which is more expensive. I had student oyster card plus another extra oyster both with credit in case something happens. In St Pancras, I put the ticket in the reading machine and the doors did not open. I approached to one of the guards and asked him why the doors did not open. The guard took the tickets and told me that the ticket I had was for Cricklewood not St Pancras. The guard began to question me about whether I wanted to go out at the wrong station, he asked me for a document with my name and address. I showed him my oyster and he checked the credit on it. He told me that I did not look like the one in the photo to which I replied that how could he know that if I was wearing a mask. I told him that I was starting my quarantine and I showed him the immigration quarantine document with my personal details, and he wrote in his notebook. I explained him that my destination was Cricklewood, but I don't remember say that I missed the stop. I asked him what was wrong, what was the problem and he told me that nothing was wrong . The guard insisted on whether I wanted to go out at the station, I must admit that I did not understand much what he was saying either, I was worried because I was not feeling well and I was in quarantine, at the airport I was told to go directly to my house and avoid contact, In fact, I had the covi-19 test few days later. The guard gave me back my oyster but he did not give me any copy or the tickets that I had bought, I only have the bank statement that says the value and that it was in Luton train station and the ticket from the airport to Luton city. The guard only told me that the company would contact me. I had in my head the idea that the ticket was from Luton to London as something general not that I cannot exit in St Pancras. I searched tickets price and there is indeed a price difference between Cricklewood and St Pancras station. In any moment I have the intention of avoiding paying the corresponding price, because I had the money to do so. However, obviously my ticket was not a valid ticket or that is what I understand, I do not understand very well how the train lines works and I do not use them frequently, I always use my travel card zona 1-3 and pay as you go. My question is, what should I expect now, what should I do? Should I look for a solicitor advice? Should I contact them if I do not receive any letter? I have read in this forum and the mere fact of having a criminal record risky my studies. This year is my last year in University and I do not know how this might affect whether I decide to do a master's degree or just find a job. I have been waiting many years for the opportunity to go to the university and now this, because I did not pay enough attention.