On our first day heading into the city from our hotel on the tram we got off at the wrong stop. After walking around a bit we found a underground station and decided to get the train to Republic Square. The lady in the ticket box did not have English but we pointed on the map where we wanted to go and she sold us 2 26 czk tickets. We validated our tickets before getting on the train. When we got off at Republic Square and were heading out of the train station a man flashed what looked like a key ring at me, I thought he was trying to sell me something so I said no and kept walking. He stopped my husband. He wanted to see our train tickets. He did not show us any form of ID other than the ‘key ring’. I was suspicious as I had read on a Prague website about a scam that involved people pretending to be ticket inspectors and demanding money saying you hadn’t validated your ticket. My husband searched frantically in his pockets for our 2 tickets and it took a min or 2 to find them. With this a policeman standing near by came over and stood in front of us also. My husband produced the ticket we had used for the tram which was 18 czk and our 2 26 czk tickets which had just used for the train. The inspector said we had to pay a fine of I think 700 czk as the 18 czk ticket did not cover the distance we travelled on the train. We explained more than once it was the 26 czk we used for train. On closer inspection he realised both tickets were validated and we were correct and we did not do anything wrong. It was so intimidating have this inspector shouting at us about the ticket and so quick to say we had to pay a fine. He was not listening to us when we were explaining why we had a 3rd ticket from our first trip on the tram. The police man standing there armed with a gun was also there to intimidate us. I thought if this is the way they treat tourist about a train ticket what way are actual criminals treated. It was completely over the top. We were tourist visiting the Czech Republic and Prague for the very first time and our first day heading into the city. The experience left a very bad taste in our mouths and took from our enjoyment in our 3 day stay. I have never visited any country or city and experienced such an ordeal over a train ticket. I understand and respect the law / customs in any country but it was the manner it was handled was horrific and upsetting. .