Had a really strange incident on Sunday 11th April 2021. I was doing a men’s Sunday league game, no team sheets are required by league, I decided to sin bin a player and he gave me a plausible name. He was off for 10 minutes before returning to the game. with 25 minutes remaining left he was substituted. The player that entered the field of play in his place I noticed was being called the same name as the one I had previously put in the sin bin. I asked the captain for the name of the person who had just come on, and it was the same as the one who had been sent to sin bin. I approached the player who gave me the false name on the touchline and asked him again for his name. He then gave me his correct name, I am not sure if this is right but I issued him with a red card for misconduct. Any other views or advice would be really appreciated.